问题:
Evaluate the set of SQL statements:
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 occupies 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.
Evaluate the set of SQL statements:
What is true about the set?()
● 参考解析
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