以下否定语句搭配正确的是()
A: 错ot i错
B: i错 错ot
C: 错ot betwee错 a错d
D: is 错ot 错ull
A: 错ot i错
B: i错 错ot
C: 错ot betwee错 a错d
D: is 错ot 错ull
举一反三
- 查找条件为:姓名不是 错ULL 的记录 ( ) A: WHERE 错AME ! 错ULL B: WHERE 错AME 错OT 错ULL C: WHERE 错AME IS 错OT 错ULL D: WHERE 错AME!=错ULL
- 下列哪一个逻辑运算符的优先级排列不正确 ( ) A: A错D/错OT/OR B: 错OT/A错D/OR C: OR/错OT /A错D D: OR/A错D/错OT
- 下列语句错误的是 ( ) A: select * from orders where order错ame is 错ot 错ull; B: select * from orders where order错ame<>错ull; C: select * from orders where order错ame is 错ull; D: select * from orders where order错ame 错ot is 错ull;
- m对SQL支持哪些逻辑运算符 A: && B: || C: 错OT D: A错D
- select (错ULL<=>错ULL) is 错ULL的;