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  • day34

    1.查看岗位是teacher的员工姓名、年龄
    mysql> select * from emp;
    +----+---------+--------+------+--------+--------+-----------+
    | id | name | gender | age | salary | area | port |
    +----+---------+--------+------+--------+--------+-----------+
    | 1 | yangsir | 男 | 42 | 10.5 | 上海 | 浦东 |
    | 2 | engo | 男 | 38 | 9.4 | 山东 | 济南 |
    | 3 | jerry | 女 | 30 | 3 | 江苏 | 张家港 |
    | 4 | tank | 女 | 28 | 2.4 | 广州 | 广东 |
    +----+---------+--------+------+--------+--------+-----------+
    4 rows in set (0.00 sec)

    mysql> select name,age from emp;
    +---------+------+
    | name | age |
    +---------+------+
    | yangsir | 42 |
    | engo | 38 |
    | jerry | 30 |
    | tank | 28 |
    +---------+------+
    4 rows in set (0.00 sec)

    2.查看岗位是teacher且年龄大于30岁的员工姓名、年龄
    mysql> select name,age from emp where age>30;
    +---------+------+
    | name | age |
    +---------+------+
    | yangsir | 42 |
    | engo | 38 |
    +---------+------+
    2 rows in set (0.00 sec)

    3.查看岗位是teacher且薪资在0.9w-3w范围内的员工姓名、年龄、薪资
    mysql> select name,age,salary from emp where salary between 0.9 and 3;
    +-------+------+--------+
    | name | age | salary |
    +-------+------+--------+
    | jerry | 30 | 3 |
    | tank | 28 | 2.4 |
    +-------+------+--------+
    2 rows in set (0.00 sec)

    4.查看岗位是teacher且薪资是2.4或3.0或9.4的员工姓名、年龄、薪资
    mysql> select name,age,salary from emp where salary=2.4 or salary=3.0 or salary=9.4;4;
    +-------+------+--------+
    | name | age | salary |
    +-------+------+--------+
    | engo | 38 | 9.4 |
    | jerry | 30 | 3.0 |
    | tank | 28 | 2.4 |
    +-------+------+--------+
    3 rows in set (0.00 sec)

    5.查看岗位是teacher且薪资不是2.4或3.0或9.4的员工姓名、年龄、薪资
    mysql> select name,age,salary from emp where salary not in (9.4,3.0,2.4);
    +---------+------+--------+
    | name | age | salary |
    +---------+------+--------+
    | yangsir | 42 | 10.5 |
    +---------+------+--------+
    1 row in set (0.02 sec)

    6.查看岗位是teacher且名字是j开头的员工姓名、年薪

    mysql> select name,age,salary from emp where name like 'j%';
    +-------+------+--------+
    | name | age | salary |
    +-------+------+--------+
    | jerry | 30 | 3.0 |
    +-------+------+--------+
    1 row in set (0.00 sec)

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  • 原文地址:https://www.cnblogs.com/ghylpb/p/11761303.html
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