單項選擇題SQL SERVER中,可為數(shù)據(jù)表創(chuàng)建()的三種類型的索引。

A.聚集索引、稀疏索引、輔索引
B.聚集索引、唯一性索引、主鍵索引
C.聚集索引、類索引、主鍵索引
D.非聚集索引、候選索引、輔索引


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1.單項選擇題在Transact-SQL語法中,以下SELECT語句正確的是()。

A.SELECT * FROM student
B.SELECT * FROM student WHERE GETDATE()
C.SELECT * FROM student ORDER st_id
D.SELECT * FROM student BY St_name

4.單項選擇題創(chuàng)建一個名為"Customers"的新表,同時要求該表中包含表"clients"的所有記錄,SQL語句是()。

A.SELECT * INTO customers FROM clients
B.SELECT INTO customers FROM clients
C.INSERT INTO customers SELECT * FROM clients
D.INSERT customers SELECT * FROM clients

5.單項選擇題要查詢st_info表中姓"王"且單名的學(xué)生情況,可用()命令。

A.SELECT * FROM st_info WHERE st_name LIKE ´王%´
B.SELECT * FROM st_info WHERE st_name LIKE ´王_´
C.SELECT * FROM st_info WHERE st_name=´王%´
D.SELECT * FROM st_info WHERE st_name=´王__´