你可能感興趣的試題

Given the following two tables:
TAB1 C1 C2
1 Antarctica 2 Africa 3 Asia 4 Australia TAB2 CX CY
5 Europe 6 North America 7 South America
Which of the following SQL statements will insert all rows found in table TAB2 into table TAB1?（）

A.INSERT INTO tab1 SELECT cx, cy FROM tab2
B.INSERT INTO tab1 VALUES (tab2.cx, tab2.cy)
C.INSERT INTO tab1 VALUES (SELECT cx, cy FROM tab2)
D.INSERT INTO tab1 (c1, c2) VALUES (SELECT cx, cy FROM tab2)

單項(xiàng)選擇題

Given that tables T1 and T2 contain the following rows: Table T1:
C1 C2
5 4 5 2 5 5
Table T2: C1 C2 5 1 5 2 5 3
Which of the following queries will return only those rows that exist in T1 and not in T2?（）

A.SELECT * FROM T1 MINUS SELECT * FROM T2
B.SELECT * FROM T1 EXCEPT SELECT * FROM T2
C.SELECT * FROM T2 UNION EXCEPT SELECT * FROM T1
D.SELECT * FROM T1 NOT EXISTS SELECT * FROM T2

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你可能感興趣的試題

Given the following two tables: TAB1 C1 C2 1 Antarctica 2 Africa 3 Asia 4 Australia TAB2 CX CY 5 Europe 6 North America 7 South America Which of the following SQL statements will insert all rows found in table TAB2 into table TAB1?（）

Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 5 4 5 2 5 5 Table T2: C1 C2 5 1 5 2 5 3 Which of the following queries will return only those rows that exist in T1 and not in T2?（）

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Given the following two tables:
TAB1 C1 C2
1 Antarctica 2 Africa 3 Asia 4 Australia TAB2 CX CY
5 Europe 6 North America 7 South America
Which of the following SQL statements will insert all rows found in table TAB2 into table TAB1?（）

Given that tables T1 and T2 contain the following rows: Table T1:
C1 C2
5 4 5 2 5 5
Table T2: C1 C2 5 1 5 2 5 3
Which of the following queries will return only those rows that exist in T1 and not in T2?（）