1. You are creating the EMPLOYEES table. This table should contain the COMMISSION_PCT column and use a value of 10 percent if no commission value is provided when a record is inserted. Which line should you include in the CREATE TABLE statement to accomplish this task? ♦commission_pct NUMBER(4,2) DEFAULT 0.10 (*) ♦commission_pct NUMBER(4,2) DEFAULT = 0.10 ♦commission_pct NUMBER(4,2) DEFAULT (0.10) ♦commission_pct NUMBER(4,2) (DEFAULT, 0.10) 2. Evaluate this CREATE TABLE statement: 1. CREATE TABLE customer#1 ( 2. cust_1 NUMBER(9), 3. sales$ NUMBER(9), 4. 2date DATE DEFAULT SYSDATE); Which line of this statement will cause an error? ♦1 ♦2 ♦3 ♦4 (*) 3. Which of the following SQL statements will create a table called Birthdays with three columns for storing employee number, name and birthdate? ♦CREATE table BIRTHDAYS (EMPNO, EMPNAME, BIRTHDATE); ♦CREATE table BIRTHDAYS (employee number, name, date of birth); ♦CREATE TABLE Birthdays (Empno NUMBER, Empname CHAR(20), Birthdate DATE); (*) ♦CREATE TABLE Birthdays (Empno NUMBER, Empname CHAR(20), Date of Birth DATE); 4. Which column name is valid? ♦1NUMBER ♦NUMBER ♦NUMBER_1$ (*) ♦1_NUMBER# 5. Evaluate this CREATE TABLE statement: CREATE TABLE line_item ( line_item_id NUMBER(9), order_id NUMBER(9), product_id NUMBER(9)); You are a member of the SYSDBA role, but are not logged in as SYSDBA. You issue this CREATE TABLE statement. Which statement is true? ♦You created the LINE_ITEM table in the public schema. ♦You created the LINE_ITEM table in the SYS schema. ♦You created the table in your schema. (*) ♦You created the table in the SYSDBA schema. 6. You need to store the HIRE_DATE value with a time zone displacement value and allow data to be returned in the user’s local session time zone. Which data type should you use? ♦DATETIME ♦TIMESTAMP ♦TIMESTAMP WITH TIME ZONE ♦TIMESTAMP WITH LOCAL TIME ZONE (*) 7. The SPEED_TIME column should store a fractional second value. Which ♦DATE ♦DATETIME ♦TIMESTAMP (*) ♦INTERVAL DAY TO SECOND 8. Which data types stores variable-length character data? Select two. ♦CHAR ♦NCHAR ♦CLOB (*) ♦VARCHAR2 (*) 9. Evaluate this CREATE TABLE statement: CREATE TABLE sales (sales_id NUMBER, customer_id NUMBER, employee_id NUMBER, sale_date TIMESTAMP WITH LOCAL TIME ZONE, sale_amount NUMBER(7,2)); Which statement about the SALE_DATE column is true? ♦Data will be normalized to the client time zone. ♦Data stored will not include seconds. ♦Data will be stored using a fractional seconds precision of 5. ♦Data stored in the column will be returned in the database’s local time zone. (*) 10. Evaluate this CREATE TABLE statement: CREATE TABLE sales ( sales_id NUMBER(9), customer_id NUMBER(9), employee_id NUMBER(9), description VARCHAR2(30), sale_date TIMESTAMP WITH LOCAL TIME ZONE DEFAULT SYSDATE, sale_amount NUMBER(7,2)); Which business requirement will this statement accomplish? ♦Sales identification values could be either numbers or characters, or a combination of both. ♦All employee identification values are only 6 digits so the column should be variable in length. ♦Description values can range from 0 to 30 characters so the column should be fixed in length. ♦Today’s date will be used if no value is provided for the sale date. (*) 11. A table has a column: RESPONSE_TIME. This is used to store the difference between the time a problem was reported and until is was resolved. Data in the RESPONSE_TIME column needs to be stored in days, hours, minutes and seconds. Which data type should you use? ♦DATETIME ♦TIMESTAMP ♦INTERVAL YEAR TO MONTH ♦INTERVAL DAY TO SECOND (*) 12. The ELEMENTS column is defined as: NUMBER(6,4) How many digits to ♦zero ♦two ♦four (*) ♦six 13. You need to truncate the EMPLOYEES table. The EMPLOYEES table is ♦the DROP ANY TABLE system privilege (*) ♦the TRUNCATE ANY TABLE system privilege ♦the CREATE ANY TABLE system privilege ♦the ALTER ANY TABLE system privilege 14. You need to remove all the rows from the SALES_HIST table. You want to release the storage space, but do not want to remove the table structure. Which statement should you use? ♦the DROP TABLE statement ♦the ALTER TABLE statement ♦the DELETE statement ♦the TRUNCATE TABLE statement (*) 15. The EMPLOYEES contains these columns: LAST_NAME VARCHAR2(15) NOT NULL FIRST_NAME VARCHAR2(10) NOT NULL EMPLOYEE_ID NUMBER(4) NOT NULL HIRE_DATE DATE NOT NULL You need to remove the EMPLOYEE_ID column from the EMPLOYEES table. Which statement could you use to accomplish this task? ♦ALTER TABLE employees MODIFY (employee_id NUMBER(5)); ♦ALTER TABLE employees DELETE employee_id; ♦ALTER TABLE employees DROP COLUMN employee_id; (*) ♦DELETE FROM employees WHERE column = employee_id; 16. You need to remove all the data in the SCHEDULE table, the structure of the table, and the indexes associated with the table. Which statement should you use? ♦DROP TABLE (*) ♦TRUNCATE TABLE ♦ALTER TABLE ♦DELETE TABLE 17. Evaluate the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER(9) LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) DEPARTMENT_ID NUMBER(9) MANAGER_ID NUMBER(9) SALARY NUMBER(7,2) The EMPLOYEE_ID column currently contains 500 employee identification numbers. Business requirements have changed and you need to allow users to include text characters in the identification values. Which statement should you use to change this column’s data type? ♦ALTER TABLE employee MODIFY (employee_id VARCHAR2(9)); ♦ALTER TABLE employee REPLACE (employee_id VARCHAR2(9)); ♦ALTER employee TABLE MODIFY COLUMN (employee_id VARCHAR2(15)); ♦You CANNOT modify the data type of the EMPLOYEE_ID column, as the table is not empty. (*) 18. You need to change the name of the EMPLOYEES table to the EMP ♦RENAME employees emp; ♦ALTER TABLE employees RENAME TO emp; 19. Which command could you use to quickly remove all data from the ♦ALTER TABLE ♦DROP TABLE ♦MODIFY ♦TRUNCATE TABLE (*) 20. Evaluate the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER(9) LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) DEPARTMENT_ID NUMBER(9) MANAGER_ID NUMBER(9) SALARY NUMBER(7,2) Which statement should you use to increase the LAST_NAME column length to 35 if the column currently contains 200 records? ♦ALTER employee TABLE ALTER COLUMN (last_name VARCHAR2(35)); ♦ALTER TABLE employee RENAME last_name VARCHAR2(35); ♦ALTER TABLE employee MODIFY (last_name VARCHAR2(35)); (*) ♦You CANNOT increase the width of the LAST_NAME column. 21. Evaluate this statement: ALTER TABLE inventory MODIFY (backorder_amount NUMBER(8,2)); Which task will this statement accomplish? ♦Alters the definition of the BACKORDER_AMOUNT column to NUMBER(8 2) ♦Alters the definition of the BACKORDER_AMOUNT column to NUMBER ♦Alters the definition of the BACKORDER_AMOUNT column to NUMBER(2,8) ♦Alters the definition of the BACKORDER_AMOUNT column to NUMBER(8.2) ♦Changes the definition of the BACKORDER_AMOUNT column to NUMBER(8,2) (*) 22. Which statement about decreasing the width of a column is true? ♦When a character column contains data, you cannot decrease the width of the column. ♦When a character column contains data, you can decrease the width of the column without any restrictions. ♦When a character column contains data, you can decrease the width of the column if the existing data does not violate the new size. (*) ♦You cannot decrease the width of a character column unless the table in which the column resides is empty. 23. Comments on tables and columns can be stored for documentation by: ♦Embedding /* comment */ within the definition of the table. ♦Using the ALTER TABLE CREATE COMMENT syntax ♦Using the COMMENT ON TABLE or COMMENT on COLUMN (*) ♦Using an UPDATE statement on the USER_COMMENTS table 24. Which statement about constraints is true? ♦A single column can have only one constraint applied. ♦PRIMARY KEY constraints can only be specified at the column level. ♦NOT NULL constraints can only be specified at the column level. (*) ♦UNIQUE constraints are identical to PRIMARY KEY constraints. 25. Evaluate this CREATE TABLE statement: CREATE TABLE customers (customer_id NUMBER, customer_name VARCHAR2(25), address VARCHAR2(25), city VARCHAR2(25), region VARCHAR2(25), postal_code VARCHAR2(11), CONSTRAINT customer_id_un UNIQUE(customer_id), CONSTRAINT customer_name_nn NOT NULL(customer_name)); Why does this statement fail when executed? ♦The NUMBER data types require precision values. ♦UNIQUE constraints must be defined at the column level. ♦The CREATE TABLE statement does NOT define a PRIMARY KEY. ♦NOT NULL constraints CANNOT be defined at the table level. (*) 26. Which constraint can only be created at the column level? ♦NOT NULL (*) ♦FOREIGN KEY ♦UNIQUE ♦CHECK 27. You need to ensure that the LAST_NAME column does not contain null values. Which type of constraint should you define on the LAST_NAME column? ♦CHECK ♦UNIQUE ♦NOT NULL (*) ♦PRIMARY KEY 28. You need to add a NOT NULL constraint to the COST column in the ♦ALTER TABLE part MODIFY (cost part_cost_nn NOT NULL); ♦ALTER TABLE part ADD (cost CONSTRAINT part_cost_nn NOT NULL); 29. A table can only have one unique key constraint defined. True or ♦True 30. Which of the following FOREIGN KEY Constraint keywords identifies ♦RESEMBLES ♦ON DELETE CASCADE ♦REFERENTIAL ♦REFERENCES (*) 31. How many PRIMARY KEY constraints can be created for each table? ♦none ♦unlimited 32. You need to create the PROJECT_HIST table. The table must meet these requirements: The table must contain the EMPLOYEE_ID and TASKED_HOURS columns for numeric data. The table must contain the START_DATE and END_DATE column for date values. The table must contain the HOURLY_RATE and PROJECT_COST columns for numeric data with precision and scale of 5,2 and 10,2 respectively. The table must have a composite primary key on the EMPLOYEE_ID and START_DATE columns. Evaluate this CREATE TABLE statement: CREATE TABLE project_hist ( employee_id NUMBER, start_date DATE, end_date DATE, tasked_hours NUMBER, hourly_rate NUMBER(5,2), project_cost NUMBER(10,2), CONSTRAINT project_hist_pk PRIMARY KEY(employee_id, start_date)); How many of the requirements does the CREATE TABLE statement satisfy? ♦None of the four requirements ♦Only two of the requirements 33. Which statement about a non-mandatory foreign key constraint is ♦A foreign key value cannot be null. ♦A foreign key value must be unique. ♦A foreign key value must match an existing value in the parent table. ♦A foreign key value must either be null or match an existing value in the parent table. (*) 34. Which of the following types of constraints enforces uniqueness? ♦CHECK ♦FOREIGN KEY ♦PRIMARY KEY (*) ♦NOT NULL 35. Evaluate the structure of the DONATIONS table. DONATIONS PLEDGE_ID NUMBER NOT NULL, Primary Key DONOR_ID NUMBER Foreign key to DONOR_ID column of DONORS table PLEDGE_DT DATE AMOUNT_PLEDGED NUMBER (7,2) AMOUNT_PAID NUMBER (7,2) PAYMENT_DT DATE Which CREATE TABLE statement should you use to create the DONATIONS table? ♦CREATE TABLE donations (pledge_id NUMBER PRIMARY KEY, donor_id NUMBER FOREIGN KEY REFERENCES donors(donor_id), pledge_date DATE, amount_pledged NUMBER, amount_paid NUMBER, payment_dt DATE); ♦CREATE TABLE donations (pledge_id NUMBER PRIMARY KEY NOT NULL, donor_id NUMBER FOREIGN KEY donors(donor_id), pledge_date DATE, amount_pledged NUMBER(7,2), amount_paid NUMBER(7,2), payment_dt DATE); ♦CREATE TABLE donations pledge_id NUMBER PRIMARY KEY, donor_id NUMBER FOREIGN KEY donor_id_fk REFERENCES donors(donor_id), pledge_date DATE, amount_pledged NUMBER(7,2), amount_paid NUMBER(7,2), payment_dt DATE; ♦CREATE TABLE donations (pledge_id NUMBER PRIMARY KEY, donor_id NUMBER CONSTRAINT donor_id_fk REFERENCES donors(donor_id), pledge_date DATE, amount_pledged NUMBER(7,2), amount_paid NUMBER(7,2), payment_dt DATE); (*) 36. When creating a referential constraint, which keyword(s) ♦FOREIGN KEY ♦ON DELETE SET NULL 37. When creating the EMPLOYEES table, which clause could you use to ♦CONSTRAINT CHECK salary > 1000 ♦CHECK CONSTRAINT (salary > 1000) ♦CONSTRAINT employee_salary_min CHECK salary > 1000 ♦CONSTRAINT employee_salary_min CHECK (salary >= 1000) (*) ♦CHECK CONSTRAINT employee_salary_min (salary > 1000) 38. The PO_DETAILS table contains these columns: PO_NUM NUMBER NOT NULL, Primary Key PO_LINE_ID NUMBER NOT NULL, Primary Key PRODUCT_ID NUMBER Foreign Key to PRODUCT_ID column of the PRODUCTS table QUANTITY NUMBER UNIT_PRICE NUMBER(5,2) Evaluate this statement: ALTER TABLE po_details DISABLE CONSTRAINT po_details_pk CASCADE; For which task would you issue this statement? ♦To create a new PRIMARY KEY constraint on the PO_NUM column ♦To drop and recreate the PRIMARY KEY constraint on the PO_NUM column ♦To disable the PRIMARY KEY and any FOREIGN KEY constraints that are dependent on the PO_NUM column (*) ♦To disable the constraint on the PO_NUM column while creating a PRIMARY KEY index 39. You need to add a PRIMARY KEY to the DEPARTMENTS table. Which ♦ALTER TABLE departments ADD PRIMARY KEY dept_id_pk (dept_id); ♦ALTER TABLE departments ADD CONSTRAINT dept_id_pk PK (dept_id); ♦ALTER TABLE departments ADD CONSTRAINT dept_id_pk PRIMARY KEY (dept_id); (*) ♦ALTER TABLE departments ADD CONSTRAINT PRIMARY KEY dept_id_pk (dept_id); 40. You need to display the names and definitions of constraints only ♦DBA_CONSTRAINTS ♦USER_CONS_COLUMNS 41. Which statement should you use to add a FOREIGN KEY constraint to the DEPARTMENT_ID column in the EMPLOYEES table to refer to the DEPARTMENT_ID column in the DEPARTMENTS table? ♦ALTER TABLE employees MODIFY COLUMN dept_id_fk FOREIGN KEY (department_id) REFERENCES departments(department_id); ♦ALTER TABLE employees ADD CONSTRAINT dept_id_fk FOREIGN KEY (department_id) REFERENCES departments(department_id); (*) ♦ALTER TABLE employees ADD FOREIGN KEY CONSTRAINT dept_id_fk ON (department_id) REFERENCES departments(department_id); ♦ALTER TABLE employees ADD FOREIGN KEY departments(department_id) REFERENCES (department_id); 42. When dropping a constraint, which keyword(s) specifies that all the referential integrity constraints that refer to the primary and unique keys defined on the dropped columns are dropped as well? ♦FOREIGN KEY ♦REFERENCES ♦CASCADE (*) ♦ON DELETE SET NULL 43. Examine the structures of the PRODUCT and SUPPLIER tables. PRODUCT PRODUCT_ID NUMBER NOT NULL, Primary Key PRODUCT_NAME VARCHAR2 (25) SUPPLIER_ID NUMBER Foreign key to SUPPLIER_ID of the SUPPLIER table LIST_PRICE NUMBER (7,2) COST NUMBER (7,2) QTY_IN_STOCK NUMBER QTY_ON_ORDER NUMBER REORDER_LEVEL NUMBER REORDER_QTY NUMBER SUPPLIER SUPPLIER_ID NUMBER NOT NULL, Primary Key SUPPLIER_NAME VARCHAR2 (25) ADDRESS VARCHAR2 (30) CITY VARCHAR2 (25) REGION VARCHAR2 (10) POSTAL_CODE VARCHAR2 (11) Evaluate this statement: ALTER TABLE suppliers DISABLE CONSTRAINT supplier_id_pk CASCADE; For which task would you issue this statement? ♦To remove all constraint references to SUPPLIERS table ♦To drop the FOREIGN KEY constraint on the PRODUCTS table ♦To remove all constraint references to the PRODUCTS table ♦To disable any dependent integrity constraints on the SUPPLIER_ID column in the PRODUCTS table ♦To disable any dependent integrity constraints on the SUPPLIER_ID column in the SUPPLIERS table (*) 44. What is the syntax for removing a PRIMARY KEY constraint and all ♦ALTER TABLE table_name DROP CONSTRAINT constraint_name; 45. Evaluate this statement: ALTER TABLE employees ADD CONSTRAINT employee_id PRIMARY KEY; Which result will the statement provide? ♦A syntax error will be returned. (*) ♦A constraint will be added to the EMPLOYEES table. ♦An existing constraint on the EMPLOYEES table will be overwritten. ♦An existing constraint on the EMPLOYEES table will be enabled. 46. You disabled the EMPLOYEE_ID_PK PRIMARY KEY constraint on the ID column in the EMPLOYEES table and imported 100 records. You need to enable the constraint and verify that the new and existing ID column values do not violate the PRIMARY KEY constraint. Evaluate this statement: ALTER TABLE employees ENABLE employee_id_pk; Which statement is true? ♦The statement will achieve the desired result. ♦The statement will execute, but will ensure that the new ID values are unique. ♦The statement will execute, but will not verify that the existing values are unique. ♦The statement will NOT execute because it contains a syntax error. (*) 47. This SQL command will do what? ALTER TABLE employees ADD CONSTRAINT emp_manager_fk FOREIGN KEY(manager_id) REFERENCES employees(employee_id); ♦Alter the table employees and disable the emp_manager_fk constraint. each employee ID must be unique. 48. Evaluate this CREATE VIEW statement: CREATE VIEW pt_view AS (SELECT first_name, last_name, status, courseid, subject, term FROM faculty f, course c WHERE f.facultyid = c.facultyid); Which type of view will this statement create? ♦nested ♦simple ♦inline ♦complex (*) 49. Which keyword(s) would you include in a CREATE VIEW statement to ♦FORCE (*) ♦NOFORCE ♦OR REPLACE ♦WITH READ ONLY 50. Which statement would you use to alter a view? ♦ALTER VIEW ♦MODIFY VIEW ♦ALTER TABLE ♦CREATE OR REPLACE VIEW (*) 51. Views must be used to select data from a table if one exist. As soon as a view is created on a table, you can no longer select direct from the table. True or False? ♦True 52. You need to create a view on the SALES table, but the SALES table ♦You must create the SALES table before creating the view. ♦By default, the view will be created even if the SALES table does not exist. ♦You can create the table and the view at the same time using the FORCE option. ♦You can use the FORCE option to create the view before the SALES table has been created. (*) 53. Which of the following keywords cannot be used when creating a ♦HAVING ♦WHERE ♦ORDER BY ♦They are all valid keywords when creating views. (*) 54. You administer an Oracle database, which contains a table named EMPLOYEES. Luke, a database user, must create a report that includes the names and addresses of all employees. You do not want to grant Luke access to the EMPLOYEES table because it contains sensitive data. Which of the following actions should you perform first? ♦Create the report for him. ♦Create an index. 55. Which of the following statements is a valid reason for using a ♦Views allow access to the data because the view displays all of the columns from the table. ♦Views provide data independence for infrequent users and application programs. One view can be used to retrieve data from several tables. ♦Views can be used to provide data security. (*) ♦Views are used when you only want to restrict DML operations using a WITH CHECK OPTION.♦Views are not valid unless you have more than one user. 56. What is the purpose of including the WITH CHECK OPTION clause when ♦To make sure that the parent table(s) actually exist ♦To keep views from being queried by unauthorized persons ♦To make sure that data is not duplicated in the view ♦To make sure no rows are updated through the view that will hinder those rows from being returned by the view. (*) 57. You cannot insert data through a view if the view includes ______. ♦a WHERE clause ♦a join ♦a column alias ♦a GROUP BY clause (*) 58. Which statement about performing DML operations on a view is true? ♦You can delete data in a view if the view contains the DISTINCT keyword. ♦You cannot modify data in a view if the view contains a WHERE clause. ♦You cannot modify data in a view if the view contains a group function. (*) ♦You can modify data in a view if the view contains a GROUP BY clause. 59. You cannot modify data in a view if the view contains ______. ♦the DISTINCT keyword (*) ♦a WHERE clause ♦a subquery in the FROM clause ♦the WITH CHECK OPTION clause 60. Your manager has just asked you to create a report that illustrates the salary range of all the employees at your company. Which of the following SQL statements will create a view called SALARY_VU based on the employee last names, department names, salaries, and salary grades for all employees? Use the EMPLOYEES, DEPARTMENTS, and JOB_GRADES tables. Label the columns Employee, Department, Salary, and Grade, respectively. ♦CREATE OR REPLACE VIEW salary_vu AS SELECT e.last_name “Employee”, d.department_name “Department”, e.salary “Salary”, j.grade_level “Grade” FROM employees e, departments d, job_grades WHERE e.department_id equals d.department_id AND e.salary BETWEEN j.lowest_sal and j.highest_sal; ♦CREATE OR REPLACE VIEW salary_vu AS SELECT e.empid “Employee”, d.department_name “Department”, e.salary “Salary”, j.grade_level “Grade” FROM employees e, departments d, job_grades j WHERE e.department_id = d.department_id NOT e.salary BETWEEN j.lowest_sal and j.highest_sal; ♦CREATE OR REPLACE VIEW salary_vu AS SELECT e.last_name “Employee”, d.department_name “Department”, e.salary “Salary”, j.grade_level “Grade” FROM employees e, departments d, job_grades j WHERE e.department_id = d.department_id AND e.salary BETWEEN j.lowest_sal and j.highest_sal; (*) ♦CREATE OR REPLACE VIEW salary_vu FROM (SELECT e.last_name “Employee”, d.department_name “Department”, e.salary “Salary”, j.grade_level “Grade” FROM employees emp, departments d, job grades j WHERE e.department_id = d.department_id AND e.salary BETWEEN j.lowest_sal and j.highest_sal); 61. Which of the following is TRUE regarding simple views? ♦They derive data from many tables, so they typically contain joins. ♦They contain functions or groups of data ♦They can perform DML operations through the view (*) ♦They are not stored in the Data Dictionary 62. You administer an Oracle database. Jack manages the Sales department. He and his employees often find it necessary to query the database to identify customers and their orders. He has asked you to create a view that will simplify this procedure for himself and his staff. The view should not accept INSERT, UPDATE or DELETE operations. Which of the following statements should you issue? ♦CREATE VIEW sales_view AS (SELECT companyname, city, orderid, orderdate, total FROM customers, orders WHERE custid = custid) WITH READ ONLY; ♦CREATE VIEW sales_view (SELECT c.companyname, c.city, o.orderid, o. orderdate, o.total FROM customers c, orders o WHERE c.custid = o.custid) WITH READ ONLY; ♦CREATE VIEW sales_view AS (SELECT c.companyname, c.city, o.orderid, o.orderdate, o.total FROM customers c, orders o WHERE c.custid = o.custid); ♦CREATE VIEW sales_view AS (SELECT c.companyname, c.city, o.orderid, o.orderdate, o.total FROM customers c, orders o WHERE c.custid = o.custid) WITH READ ONLY; (*) 63. The EMPLOYEES table contains these columns: EMPLOYEE_ID NUMBER LAST_NAME VARCHAR2(25) FIRST_NAME VARCHAR2(25) DEPARTMENT_ID NUMBER JOB_ID NUMBER MANAGER_ID NUMBER SALARY NUMBER(9,2) COMMISSOIN NUMBER(7,2) HIRE_DATE DATE Which SELECT statement could be used to display the 10 lowest paid clerks that belong to department 70? ♦SELECT ROWNUM “Ranking”, last_name||’ ,’||first_name “Employee”, salary “Salary” FROM (SELECT last_name, first_name, salary FROM employees ORDER BY salary) WHERE ROWNUM <=10 AND job_id LIKE ‘CLERK’ AND department_id = 70; ♦SELECT ROWNUM “Ranking”,last_name||’,’||first_name “Employee”, salary “Salary” FROM (SELECT last_name, first_name, salary, job_id FROM employees WHERE job_id LIKE ‘CLERK’ AND department_id = 70 ORDER BY salary) WHERE ROWNUM <=10; (*) ♦SELECT ROWNUM “Ranking”, last_name||’ ,’||first_name “Employee”, salary “Salary” FROM (SELECT last_name, first_name, salary,job_id,dept_id FROM employees WHERE ROWNUM <=10 ORDER BY salary) WHERE job_id LIKE ‘CLERK’ AND department_id = 70; ♦The only way is to use the data dictionary. 64. The CUSTOMER_FINANCE table contains these columns: CUSTOMER_ID NUMBER(9) NEW_BALANCE NUMBER(7,2) PREV_BALANCE NUMBER(7,2) PAYMENTS NUMBER(7,2) FINANCE_CHARGE NUMBER(7,2) CREDIT_LIMIT NUMBER(7) You execute this statement: SELECT ROWNUM “Rank”, customer_id, new_balancev FROM (SELECT customer_id, new_balance FROM customer_finance) WHERE ROWNUM <= 25 ORDER BY new_balance DESC; What statement is true? ♦The statement failed to execute because an inline view was used. Top-n column. 65. An “inline view” is an unnamed select statement found: ♦In the user_views data dictionary view ♦In a special database column of a users table ♦Enclosed in parenthesis within the select list of a surrounding query ♦Enclosed in parenthesis within the from clause of a surrounding query (*) 66. The EMP_HIST_V view is no longer needed. Which statement should ♦DROP emp_hist_v; ♦DELETE emp_hist_v; ♦REMOVE emp_hist_v; ♦DROP VIEW emp_hist_v; (*) 67. You must create a view that when queried will display the name, customer identification number, new balance, finance charge and credit limit of all customers. You issue this statement: CREATE OR REPLACE VIEW CUST_CREDIT_V AS SELECT c.last_name, c.customer_id, a.new_balance, a.finance_charge, a.credit_limit FROM customers c, accounts a WHERE c.account_id = a.account_id WITH READ ONLY; Which type of SQL command can be issued on the CUST_CREDIT_V view? ♦UPDATE ♦DELETE ♦INSERT ♦SELECT (*) 68. Sequences can be used to: (choose three) ♦Ensure primary key values will be unique and consecutive 69. You create a sequence with the following statement: CREATE SEQUENCE my_emp_seq; Which of the following statements about this sequence are true? (Choose two) (Choose all correct answers) ♦MINVALUE is equal to 1. (*) ♦MAXVALUE is unlimited. ♦When the sequence exceeds its maximum value it will continue to generate numbers starting with MINVALUE. ♦The sequence will cache a range of numbers in memory. (*) 70. A gap can occur in a sequence because a user generated a number ♦True (*) 71. Which statement would you use to modify the EMP_ID_SEQ sequence ♦ALTER SEQUENCE emp_id_seq.employee_id …; ♦CREATE SEQUENCE emp_id_seq …; ♦ALTER TABLE employees …; ♦ALTER SEQUENCE emp_id_seq …; (*) 72. To see the most recent value that you fetched from a sequence ♦my_seq.nextval ♦my_seq.(currval) ♦my_seq.(lastval) ♦my_seq.currval (*) 73. For which column would you create an index? ♦A column which has only 4 distinct values. ♦A column that is updated frequently ♦A column with a large number of null values (*) ♦A column that is infrequently used as a query search condition 74. Which of the following SQL statements will display the index name, table name, and the uniqueness of the index for all indexes on the EMPLOYEES table? ♦CREATE index_name, table_name, uniqueness FROM user_indexes WHERE table_name = ‘EMPLOYEES’; ♦SELECT index_name, table_name, uniqueness FROM ‘EMPLOYEES’; ♦SELECT index_name, table_name, uniqueness FROM user_indexes WHERE table_name = ‘EMPLOYEES’; (*) ♦SELECT index_name, table_name, uniqueness FROM user_indexes WHERE index = EMPLOYEES; 75. Which statement would you use to remove the LAST_NAME_IDX index on ♦DROP INDEX last_name_idx; (*) ♦DROP INDEX last_name_idx(last_name); ♦DROP INDEX last_name_idx(employees.last_name); ♦ALTER TABLE employees DROP INDEX last_name_idx; 76. Which of the following is created automatically by Oracle when a ♦a PRIMARY KEY constraint ♦a CHECK constraint ♦an index (*) ♦a FOREIGN KEY constraint 77. Evaluate this statement: CREATE INDEX sales_idx ON oe.sales (status); Which statement is true? ♦The CREATE INDEX creates a function-based index. ♦The CREATE INDEX statement fails because of a syntax error. 78. Which one of the following statements about indexes is true? ♦An index is created automatically when a PRIMARY KEY constraint is created. 79. What is the correct syntax for creating an index? ♦CREATE INDEX index_name ON table_name(column_name); (*) ♦CREATE INDEX on table_name(column_name); ♦CREATE index_name INDEX ON table_name.column_name; ♦CREATE OR REPLACE INDEX index_name ON table_name(column_name); 80. The CLIENTS table contains these columns: CLIENT_ID NUMBER(4) NOT NULL PRIMARY KEY LAST_NAME VARCHAR2(15) FIRST_NAME VARCHAR2(10) CITY VARCHAR2(15) STATE VARCHAR2(2) You want to create an index named ADDRESS_INDEX on the CITY and STATE columns of the CLIENTS table. You issue this statement: CREATE INDEX clients ON address_index (city, state); Which result does this statement accomplish? ♦An index named ADDRESS_INDEX is created on the CITY and STATE columns. ♦An index named CLIENTS is created on the CITY and STATE columns. ♦An index named CLIENTS_INDEX is created on the CLIENTS table. ♦An error message is produced, and no index is created. (*) 81. As user Julie, you issue this statement: CREATE SYNONYM emp FOR sam.employees; Which task was accomplished by this statement? ♦You created a public synonym on the EMP table owned by user Sam. ♦You created a private synonym on the EMPLOYEES table that you own. ♦You created a public synonym on the EMPLOYEES table owned by user Sam. ♦You created a private synonym on the EMPLOYEES table owned by user Sam. (*) 82. What is the correct syntax for creating a synonym d_sum for the ♦CREATE SYNONYM d_sum ON dept_sum_vu; ♦CREATE d_sum SYNONYM FOR dept_sum_vu; ♦UPDATE dept_sum_vu ON SYNONYM d_sum; ♦CREATE SYNONYM d_sum FOR dept_sum_vu; (*) 83. The CUSTOMERS table exists in user Mary’s schema. Which statement should you use to create a synonym for all database users on the CUSTOMERS table? ♦CREATE PUBLIC SYNONYM cust ON mary.customers; ♦CREATE PUBLIC SYNONYM cust FOR mary.customers; (*) ♦CREATE SYNONYM cust ON mary.customers FOR PUBLIC; ♦CREATE SYNONYM cust ON mary.customers; GRANT SELECT ON cust TO PUBLIC; 84. Evaluate this statement: CREATE PUBLIC SYNONYM testing FOR chan.testing; Which task will this statement accomplish? ♦It recreates the synonym if it already exists. ♦It forces all users to access TESTING using the synonym. ♦It allows only the user CHAN to access TESTING using the synonym. ♦It eliminates the need for all users to qualify TESTING with its schema. (*) 85. User Mary’s schema contains an EMPLOYEES table. Mary has Database Administrator privileges and executes the following statement: CREATE PUBLIC SYNONYM employees FOR mary.employees; User Susan now needs to SELECT from Mary’s EMPLOYEES table. Which of the following SQL statements can she use? (Choose two) (Choose all correct answers) ♦CREATE SYNONYM marys_employees FOR mary(employees); ♦SELECT * FROM mary.employees; (*) 86. The database administrator wants to allow user Marco to create new ♦CREATE ANY TABLE ♦SELECT ♦CREATE TABLE (*) ♦CREATE OBJECT 87. Which of the following are system privileges? (Choose two) ♦CREATE TABLE (*) ♦UPDATE ♦CREATE SYNONYM (*) ♦INDEX 88. Which of the following best describes a role in an Oracle ♦A role is a type of system privilege. ♦A role is the part that a user plays in querying the database. ♦A role is a name for a group of privileges. (*) ♦A role is an object privilege which allows a user to update a table. 89. User Kate wants to create indexes on tables in her schema. What ♦CREATE INDEX ♦CREATE ANY INDEX ♦ALTER TABLE ♦None; users do not need extra privileges to create indexes on tables in their own schema (*) 90. Which of the following are object privileges? (Choose two) ♦SELECT (*) ♦DROP TABLE ♦CREATE TABLE ♦INSERT (*) 91. You are the database administrator. You want to create a new user JONES with a password of MARK, and allow this user to create his own tables. Which of the following should you execute? ♦CREATE USER jones IDENTIFIED BY mark; GRANT CREATE TABLE TO jones; ♦CREATE USER jones IDENTIFIED BY mark; GRANT CREATE SESSION TO jones; GRANT CREATE TABLE TO jones; (*) ♦GRANT CREATE SESSION TO jones; GRANT CREATE TABLE TO jones; ♦CREATE USER jones IDENTIFIED BY mark; GRANT CREATE SESSION TO jones; 92. Evaluate this statement: ALTER USER bob IDENTIFIED BY jim; Which ♦A new password is assign to user BOB. (*) ♦A new user JIM is created from user BOB’s profile. ♦The user BOB is assigned the same privileges as user JIM. ♦The user BOB is renamed and is accessible as user JIM. 93. When granting an object privilege, which option would you include ♦WITH GRANT OPTION (*) ♦WITH ADMIN OPTION ♦PUBLIC ♦FORCE 94. You need to grant user BOB SELECT privileges on the EMPLOYEES table. You want to allow BOB to grant this privileges to other users. Which statement should you use? ♦GRANT SELECT ON employees TO bob WITH GRANT OPTION; (*) ♦GRANT SELECT ON employees TO PUBLIC WITH GRANT OPTION; ♦GRANT SELECT ON employees TO bob ♦GRANT SELECT ON employees TO bob WITH ADMIN OPTION; 95. Which statement would you use to remove an object privilege ♦ALTER USER ♦DROP 96. Which statement would you use to give a role to users? ♦GRANT (*) ♦ALTER USER ♦CREATE USER ♦ASSIGN 97. To join a table in your database to a table on a second (remote) ♦A remote procedure call ♦An Oracle gateway product ♦An ODBC driver ♦A database link (*) 98. User BOB’s schema contains an EMPLOYEES table. BOB executes the following statement: GRANT SELECT ON employees TO mary WITH GRANT OPTION; Which of the following statements can MARY now execute successfully? (Choose two) (Choose all correct answers) ♦SELECT FROM bob.employees; (*) ♦REVOKE SELECT ON bob.employees FROM bob; ♦GRANT SELECT ON bob.employees TO PUBLIC; (*) ♦DROP TABLE bob.employees; 99. Examine the following statements: UPDATE employees SET salary = 15000; SAVEPOINT upd1_done; UPDATE employees SET salary = 22000; SAVEPOINT upd2_done; DELETE FROM employees; You want to retain all the employees with a salary of 15000; What statement would you execute next? ♦ROLLBACK; or none of them can be rolled back. 100. Table MYTAB contains only one column of datatype CHAR(1). A user executes the following statements in the order shown. INSERT INTO mytab VALUES (‘A’); INSERT INTO mytab VALUES (‘B’); COMMIT; INSERT INTO mytab VALUES (‘C’); ROLLBACK; Which rows does the table now contain? ♦A, B and C ♦None of the above |
Evaluate this statement: alter user bob identified by jim;
zusammenhängende Posts
Urheberrechte © © 2024 frojeostern Inc.
