6.between...and...

6.在WHERE中使用between...and...

  用于区间值的条件判断(包含边界值)

 

  //查询工资在2000(包含)到3000(包含)之间的员工信息

  select empno,ename,sal

  from emp

  where sal>=2000 and sal<=3000;

  //采用between...and...实现

  select empno,ename,sal

  from emp

  where sal between 2000 and 3000;

 

  //查询2081年入职的，工资在2000和3000之间(包含)

  //的员工信息

  select empno,ename,sal

  from emp

  where to_char(hiredate,'yyyy')='2081'

    and sal between 2000 and 3000;

 

  //查询2081到2083年之间入职的员工信息

  select empno,ename,sal

  from emp

  where to_char(hiredate,'yyyy')>='2081'

    and to_char(hiredate,'yyyy')<='2083'