多項(xiàng)選擇題

Which three statements about subqueries are true? （）

A.Asinglerowsubquerycanretrieveonlyonecolumnandonerow.
B.Asinglerowsubquerycanretrieveonlyonerowbutmanycolumns.
C.Amultiplerowsubquerycanretrievemultiplerowsandmultiplecolumns.
D.Amultiplerowsubquerycanbecomparedusingthe"；>；"；operator.
E.AsinglerowsubquerycanusetheINoperator.
F.Amultiplerowsubquerycanusethe"；="；operator.

你可能感興趣的試題

單項(xiàng)選擇題

Which view should a user query to display the columns associated with the constraints on a table owned by the user?（）

A.USER_CONSTRAINTS
B.USER_OBJECTS
C.ALL_CONSTRAINTS
D.USER_CONS_COLUMNS
E.USER_COLUMNS

多項(xiàng)選擇題

Evaluate the SQL statement
DROP TABLE DEPT;
Which four statements are true of the SQL statement? （）

A.You cannot roll back this statement.
B.All pending transactions are committed.
C.All views based on the DEPT table are deleted.
D.All indexes based on the DEPT table are dropped.
E.All data in the table is deleted, and the table structure is also deleted.
F.All data in the table is deleted, but the structure of the table is retained.
G.All synonyms based on the DEPT table are deleted.

97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区 狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

Which three statements about subqueries are true? （）

你可能感興趣的試題

Which view should a user query to display the columns associated with the constraints on a table owned by the user?（）

Evaluate the SQL statement DROP TABLE DEPT; Which four statements are true of the SQL statement? （）

97免费在线观看视频,亚洲综合自拍网,黄色毛片免费观看,热久久综合网,免费看日产一区二区三区狠狠操av,久久久涩涩涩,在线精品免费视频,人人插天天干,久久91精品国产91久久

Evaluate the SQL statement
DROP TABLE DEPT;
Which four statements are true of the SQL statement? （）