day作业34

作业

# 1. 查看岗位是teacher的员工姓名、年龄
    mysql>select * from t0;
    +--------+-----+------------+---------+
    | name   | age | salary     | job     |
    +--------+-----+------------+---------+
    | nick   |  18 |  3000.0000 | teacher |
    | tank   |  19 |  4000.0000 | teacher |
    | big    |  22 |  5000.0000 | teacher |
    | xx     |  23 | 23232.0000 | teacher |
    | egon   |  24 |  4534.0000 | teacher |
    | jgnk   |  27 | 29900.0000 | teacher |
    | jinads |  29 | 32332.0000 | teacher |
    | box    |  33 |  5232.0000 | teacher |
    | jink   |  37 |  4000.0000 | teacher |
    | jjjj   |  39 |  9232.0000 | teacher |
    +--------+-----+------------+---------+

# 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 t0 where age>30;
    +------+-----+
    | name | age |
    +------+-----+
    | box  |  33 |
    | jink |  37 |
    | jjjj |  39 |
    +------+-----+
    
# 3. 查看岗位是teacher且薪资在9000-1000范围内的员工姓名、年龄、薪资
    mysql> select name,age,salary from t0 where salary between 9000 and 10000;
    +------+-----+-----------+
    | name | age | salary    |
    +------+-----+-----------+
    | jjjj |  39 | 9232.0000 |
    +------+-----+-----------+
    1 row in set (0.00 sec)
#  4. 查看岗位描述不为NULL的员工信息
    mysql> select job  from t0 where job is null;
    Empty set (0.11 sec)
#  5. 查看岗位是teacher且薪资是10000或9000或30000的员工姓名、年龄、薪资
    mysql> select name,age,salary from t0 where job='teacher';
    +--------+-----+------------+
    | name   | age | salary     |
    +--------+-----+------------+
    | nick   |  18 |  3000.0000 |
    | tank   |  19 |  4000.0000 |
    | big    |  22 |  5000.0000 |
    | xx     |  23 | 23232.0000 |
    | egon   |  24 |  4534.0000 |
    | jgnk   |  27 | 29900.0000 |
    | jinads |  29 | 32332.0000 |
    | box    |  33 |  5232.0000 |
    | jink   |  37 |  4000.0000 |
    | jjjj   |  39 |  9232.0000 |
    +--------+-----+------------+
#  6. 查看岗位是teacher且薪资不是10000或9000或30000的员工姓名、年龄、薪资
    mysql> select name,age,salary from t0 where salary not in (10000,9000,30000);
    +--------+-----+------------+
    | name   | age | salary     |
    +--------+-----+------------+
    | nick   |  18 |  3000.0000 |
    | tank   |  19 |  4000.0000 |
    | big    |  22 |  5000.0000 |
    | xx     |  23 | 23232.0000 |
    | egon   |  24 |  4534.0000 |
    | jgnk   |  27 | 29900.0000 |
    | jinads |  29 | 32332.0000 |
    | box    |  33 |  5232.0000 |
    | jink   |  37 |  4000.0000 |
    | jjjj   |  39 |  9232.0000 |
    +--------+-----+------------+
#  7. 查看岗位是teacher且名字是jin开头的员工姓名、年薪
    mysql> select name,salary from t0 where job='teacher' and name like 'jin%';
    +--------+------------+
    | name   | salary     |
    +--------+------------+
    | jinads | 32332.0000 |
    | jink   |  4000.0000 |
    +--------+------------+
    2 rows in set (0.20 sec)

来源：https://www.cnblogs.com/hj59988326/p/11760772.html