题目内容
(请给出正确答案)
[单选题]
在SQL语言中删除数据表的命令为()。
A.DELETETABLE
B.CREATETABLE
C.DROPTABLE
D.ALTERTABLE
答案
C、DROPTABLE
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A.DELETETABLE
B.CREATETABLE
C.DROPTABLE
D.ALTERTABLE
C、DROPTABLE
A.mysql-uroot-p123456employees
B.mysql-uroot-p123456employees>departments.sql
C.mysql-uroot-p123456employeesdepartments
D.mysql-uroot---p23456employeesdepartments>departments.sql
A.DROP PROC CountProc1;
B.DELETE PROC CountProc1;
C.DROP PROCEDURE CountProc1;
D.DELETE PROCEDURE CountProc1;
A.do-while语句构成的循环不能用其它语句构成的循环来代替
B.do-while语句构成的循环只能用break语句退出
C.do-while语句构成的循环,在while后的表达式非零时结束循环
D.do-while语句构成的循环,在while后的表达式为零时结束循环