1Z0-007章節(jié)練習(2020.04.06)

Examine the structure of the EMPLOYEES table: EMPLOYEE_ID NUMBER Primary Key
FIRST_NAME VARCHAR2(25)
LAST_NAME VARCHAR2(25)
DEPARTMENT_ID NUMBER
SALARY NUMBER
What is the correct syntax for an inline view? （）

You need to give the MANAGER role the ability to select from, insert into, and modify existing rows in the STUDENT_GRADES table. Anyone given this MANAGER role should be able to pass those privileges on to others.
Which statement accomplishes this?（）

Examine the data in the EMPLOYEES table.

On the EMPLOYEES table, EMPLOYEE_ID is the primary key. MGR_ID is the ID of managers and refers to the EMPLOYEE_ID. The JOB_ID column is a NOT NULL column.
Evaluate this DELETE statement:

Why does the DELETE statement fail when you execute it?（）

Examine the data in the EMPLOYEES table:
LAST_NAME DEPARTMENT_ID SALARY
Getz 10 3000
Davis 20 1500
Bill 20 2200
Davis 30 5000
...
Which three subqueries work? （）

Evaluate the set of SQL statements:
CREATE TABLE dept
(deptno NUMBER(2),
dname VARCNAR2(14),
1oc VARCNAR2 (13));
ROLLBACK;
DESCRIBE DEPT
What is true about the set?（）