sql - 在自身子查询上加入表

Question

我试图更好地理解子查询，但下面的这个脚本有问题。（SQL Server 数据库）

SELECT division_name, business_name, assignment_code, assignment_desc, last_name, first_name, total_salary, assign_fte, birth_year
  FROM table1 join
  (SELECT division_name, last_name, first_name, assignment_code, emp_id 
  FROM table1) raw
   WHERE raw.year_time = year_time
  AND division_name <> raw.division_name
  AND last_name = raw.last_name
  AND first_name = raw.first_name
    ORDER BY last_name, first_name

我需要做的是加入同一张表并提取员工为两个不同部门工作的数据。上面的代码在 where 子句附近有一个语法错误。

Answer 1

您缺少 JOIN 的 ON 部分

IE..

SELECT division_name, business_name, assignment_code, assignment_desc, last_name, first_name, total_salary, assign_fte, birth_year
  FROM table1 join
  (SELECT division_name, last_name, first_name, assignment_code, emp_id 
  FROM table1) raw ON raw.year_time = year_time
   WHERE
   division_name <> raw.division_name
  AND last_name = raw.last_name
  AND first_name = raw.first_name
    ORDER BY last_name, first_name