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);
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);
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'
- 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: Select* From Student Where Sex=’男’ B: Select* From Student Where Number NotIn（Select Number From Student Where Sex<>=’男’） C: Select* From Student Where NumberIn（Select Numbe rFrom Student Where Sex=’男’） D: Select* From Student Where Sex<>’男&rsquo
- 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’
- 对于学生信息表：student(sno，sname，sex，age，dept)，能够得到年龄在20岁至22岁之间的学生的姓名和学号的语句是( )。 A: SELECT*FROM student WHERE age BETWEEN 20 AND 22 B: SELECT sname，sno FROM student WHERE age BETWEEN 20 AND 22 C: SELECT sname，sno FROM student WHERE age>=20 D: SELECT sname，sno FROM student WHERE age<=22
- 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"