单项选择题
A. INSERT B. UPDATE C. SELECT D. DESCRIBE E. DELETE F. RENAME
Which object privileges can be granted on a view?（）A. n...
单项选择题Which object privileges can be granted on a view?（）
A. none B. DELETE, INSERT,SELECT C. ALTER, DELETE, INSERT, SELECT D. DELETE, INSERT, SELECT, UPDATE
Examine the structure of the EMPLOYEES table: EMPLOYEE_...
多项选择题
Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER NOT NULL, Primary Key EMP_NAME VARCHAR2(30) JOB_ID NUMBER\ SAL NUMBER MGR_ID NUMBER References EMPLOYEE_ID column DEPARTMENT_ID NUMBER Foreign key to DEPARTMENT_ID column of the DEPARTMENTS table You created a sequence called EMP_ID_SEQ in orderto populate sequential values for the EMPLOYEE_ID column of the EMPLOYEES table. Which two statements regarding the EMP_ID_SEQ sequence are true? （）
A. You cannot use the EMP_ID_SEQ sequence to populate the JOB_ID column. B. The EMP_ID_SEQ sequence is invalidated when you modify the EMPLOYEE_ID column. C. The EMP_ID_SEQ sequence is not affected by modifications to the EMPLOYEES table. D. Any other column of NUMBER data type in your schema can use the EMP_ID_SEQ sequence. E. The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEES table. F. The EMP_ID_SEQ sequence is dropped automatically when you drop the EMPLOYEE_ID column.
What is true about joining tables through an equijoin?（...
单项选择题What is true about joining tables through an equijoin?（）
A. You can join a maximum of two tables through an equijoin. B. You can join a maximum of two columns through an equijoin. C. You specify an equijoin condition in the SELECT or FROM clauses of a SELECT statement. D. To join two tables through an equijoin, the columns in the join condition must be primary key and foreign key columns. E. You can join n tables (all having single column primary keys) in a SQL statement by specifying a minimum of n-1 join conditions.
