Mysql table data query operation

1, a simple query

select * from user;

2, NULL inquiry

select * from user where hobby is NULL and age is not NULL;

3, in the query

select * from user where age in('22','23','24');

4, between and queries

select * from user where age between 21 and 55;

5, or query

select * from user where age=22 or age=23

6, order by queries

select * from user order by age asc; 升序
select * from user order by age desc; 降序

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