无码高清视频|成人自拍视频|欧美成人午夜无码A片秀色直播|草美女视频网站|美女被操网站在线观看

多項選擇題

Examine the following statement that is used to modify the constraint on the SALES table: SQL> ALTER TABLE SALES MODIFY CONSTRAINT pk DISABLE VALIDATE;
Which three statements are true regarding the above command()

A.The constraint remains valid.
B.The index on the constraint is dropped.
C.It allows the loading of data into the table using SQL*Loader.
D.New data conforms to the constraint, but existing data is not checked
E.It allows the data manipulation on the table using INSERT/UPDATE/DELETE SQL statements.

題目列表

你可能感興趣的試題

微信掃碼免費(fèi)搜題