---

Evaluate the set of SQL statements: CREATE TABLE dept (deptno NUMBER(2), dname VARCHAR2(14), loc VARCHAR2(13)); ROLLBACK; DESCRIBE DEPT What is true about the set?（）
A:The DESCRIBE DEPT statement displays the structure of the DEPT table.
B:The ROLLBACK statement frees the storage space occupied by the DEPT table.
C:The DESCRIBE DEPT statement returns an error ORA-04043: object DEPT does not exist.
D:The DESCRIBE DEPT statement displays the structure of the DEPT table only if there is a COMMIT statement introduced before the ROLLBACK statement.

---

出自：Oracle认证

显示答案