單項選擇題下面哪一條語句實現(xiàn)了下列功能:在authors數(shù)據(jù)庫中查找所有姓名以d 打頭的作家()

A. select * from authors where au_name=”d”
B. select “d” from authors
C. select * from authors where au_name like “d%”
D. select au_name like “d%” from authors


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1.單項選擇題select au_id from authors where price<$15 or price >$ 20.下面哪一條語句與這一條語句執(zhí)行效果相同()

A. select au_id from authors where price IN($15,:$20);
B. select au_id from authors where price between $15 and $20
C. select au_id from authors where price not between $15 and $20
D. select au_id from authors where price not IN($15,$20);

2.單項選擇題select au_id from authors where state=”ca” or state=”ks”.下面哪一條語句與這一條語句執(zhí)行效果相同()

A. select au_id from authors where state IN(“ac”,:”sk”);
B. select au_id from authors where state between ac and sk
C. select au_id from authors where state not between ca and ks
D. select au_id from authors where state IN(“ca”,:”ks”);

3.單項選擇題SQL SERVER 2000中,可以用下面哪一條語句把authors表重命名為表student()

A.sp_renamedb authors student
B.sp_rename  authors  student
C.sp_renamedata authors student
D.sp_renameview authors student

4.單項選擇題SQL SERVER中,可以用下面哪一條語句查看表格authors和其他對象的依賴關系()

A.sp_spaceused authors
B.sp_depends authors
C.sp_help authors
D.sp_renamedb authors student

5.單項選擇題

ALTER TABLE exa  
ADD column_b VARCHAR(20) NULL    
這條語句的語義為()

A.創(chuàng)建表格exa,使其增加一列
B.創(chuàng)建表格exa,使其刪除一列
C.修改表格exa 定義,使其增加一列
D.修改表格 exa 定義,使其刪除一列