mysql 列子查询

发布时间：2020-02-26 10:51:04 来源：网络阅读：445 作者：wx5d21d5e6e5ab1 栏目：MySQL数据库

#案例：返回location_id是1400或1700的部门中的所有员工

SELECT  last_name
FROM employees 
WHERE department_id IN(

    SELECT DISTINCT department_id
    FROM departments
    WHERE location_id IN (1400,1700)
);

#案例：返回其他工种中比job_id为'IT_PROG'部门任一工资低的员工的员工号、姓名、job_id和salary

SELECT DISTINCT employee_id,last_name,job_id,salary
FROM employees
WHERE salary<ANY(
    SELECT DISTINCT salary
    FROM employees
    WHERE job_id='IT_PROG'
) AND job_id <>'IT_PROG' ;

或者

SELECT DISTINCT employee_id,last_name,job_id,salary
FROM employees
WHERE salary<(
    SELECT DISTINCT MAX(salary)
    FROM employees
    WHERE job_id='IT_PROG'
) AND job_id <>'IT_PROG' ;

#案例：返回其他工种中比job_id为'IT_PROG'部门所有工资低的员工的员工号、姓名、job_id和salary

SELECT DISTINCT employee_id,last_name,job_id,salary
FROM employees
WHERE salary<ALL(
    SELECT DISTINCT salary
    FROM employees
    WHERE job_id='IT_PROG'
) AND job_id <>'IT_PROG' ;

或者

SELECT DISTINCT employee_id,last_name,job_id,salary
FROM employees
WHERE salary<(
    SELECT DISTINCT MIN(salary)
    FROM employees
    WHERE job_id='IT_PROG'
) AND job_id <>'IT_PROG' ;

向AI问一下细节

mysql 列子查询

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