标签：rom code evel 员工 where 级别 查询 employees sel
#案例：查询员工的工资和工资级别SELECT
salary,grade_level
FROM
employees AS e,job_grades AS j
WHERE
salary BETWEEN j.`lowest_sal` AND j.`highest_sal` #e表的salary字段会和j表的每行字段挨个比较标签：rom code evel 员工 where 级别 查询 employees sel
原文地址：https://blog.51cto.com/14437184/2437282
