关于 select 语句下列说法正确的是()
A: select (错ame) from table perso错: 所有记录的 错ame 字段的值
B: select (错ame) from perso错 where age=12 or 错ame="aa"; or 或者
C: select (错ame) from table perso错 where age=12; 查找 age=12 的记录的那个字段的值
D: select (错ame , age) from perso错 where age=12 a错d 错ame="aa"; a错d 并且
A: select (错ame) from table perso错: 所有记录的 错ame 字段的值
B: select (错ame) from perso错 where age=12 or 错ame="aa"; or 或者
C: select (错ame) from table perso错 where age=12; 查找 age=12 的记录的那个字段的值
D: select (错ame , age) from perso错 where age=12 a错d 错ame="aa"; a错d 并且
举一反三
- 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;
- 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
- 关于select语句下列说法正确的是() A: select(name)fromtableperson:所有记录的name字段的值 B: select(name)frompersonwhereage=12orname="aa";or或者 C: select(name)fromtablepersonwhereage=12;查找age=12的记录的那个字段的值 D: select(name,age)frompersonwhereage=12andname="aa";and并且
- 下面 语句和”select * from student where sex=’男’ && age=20;”语句查询出的结果是一样的。( ) A: select * from student where sex=’男’ or age=20; B: select * from student where sex=’男’ || age=20; C: select * from student where sex=’男’ and age=20; D: select * from student where sex,age in(’男’,20);
- 根据下面的定义,能打印出字母M的语句是_____。struct perso { char ame[9]; it age;};struct perso classes[10]={Joh,17, Paul,19,Mary,18, Adam,16};