单项选择题
A.Select email from student where email !=null B.Select email from student where email not is null C.Select email from student where email <> null D.Select email from student where email is not null
A.insert into book (id,title,price) values(1,'java',100) B.insert into book (title,price) values('java',100) C.insert into book values ('java',100) 这辆都不可以啊,如果不指定列需要明确的给出空值 D.insert book values('java',100)
A.select * from TABLE_NAME where rowcount=10 B.select TOP 10 * from TABLE_NAME C.select TOP of 10 * from TABLE_NAME D.select * from TABLE_NAME where rowcount<=10
A.NOT B.AND C.OR D.IN
A.COUNT() B.MIN() C.MAX() D.SUM()还有一个AVG()
A.RR IS NULL B.RR=NULL C.RR<>NULL D.RR IS NOT NULL
A.零个字符 B.1个字符串 C.多个字符串 D.以上都是
A.A B.B C.C D.D
A.ABS B.SIN C.STR D.ROUND
A.AND B.NOT C.OR D.XOR
A.a12 B.12a C.@a12 D.#qq