数据库中有一张表名称为Student，有列Number，Name，Age，IDCard，Sex。主键为Number。要求查询所有男同学信息，下列哪个SQL语句是正确的？（）
A: ASelect* From Student Where Sex=’男’
B: BSelect* From Student Where Number NotIn（Select Number From Student Where Sex<>=’男’）
C: CSelect* From Student Where NumberIn（Select Numbe rFrom Student Where Sex=’男’）
D: DSelect* From Student Where Sex<>’男’
A: ASelect* From Student Where Sex=’男’
B: BSelect* From Student Where Number NotIn（Select Number From Student Where Sex<>=’男’）
C: CSelect* From Student Where NumberIn（Select Numbe rFrom Student Where Sex=’男’）
D: DSelect* From Student Where Sex<>’男’
举一反三
- 数据库中有一张表名称为Student，有列Name，Age，IDCard，Sex。要求查询所有男同学信息，下列哪个SQL语句是正确的 A: Select * From Student Where Sex '男' B: Select * From Student Where Sex ='女' C: Select * From Student Where Sex In '男' D: Select * From Student Where Sex ='男'
- 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);
- 数据库中有一张表名称为Student，有列Name，Age，IDCard，Sex。要求写SQL语句查询出表中年龄介于20和30岁之间的数据，下列哪个SQL语句是正确的？（） A: Select* From Student Where Age>=20 ANDAge>=30 B: Select* From Student Where Age>=20 ANDAge<=30 C: Select* From Student Where Age BET WENN 20AND30 D: Select* From Student Where Age>=20&&Age>=30"
- 数据库中有一张表名称为Student，有列Number，Name，Age，IDCard，Sex。主键是Number，数据类型为Varchar(20)。删除学号为“20140001”的学生可以通过Delete From Student Where Number=‘20140001’语句进行删除
- 对于学生信息表：student(sno，sname，sex，age，dept)，要查询所有刘姓学生的信息，正确的语句是 A: SELECT * FROM student WHERE sname LIKE'刘 * ' B: SELECT * FROM student WHERE sname LIKE'刘 $' C: SELECT * FROM student WHERE sname LIKE'刘%' D: SELECT * FROM student WHERE sname LIKE'刘&'