使用SQLite进行完全外部联接 [英] FULL OUTER JOIN with SQLite

问题描述

SQLite仅具有INNER和LEFT JOIN.

SQLite only has INNER and LEFT JOIN.

是否可以使用SQLite进行完全外部联接?

Is there a way to do a FULL OUTER JOIN with SQLite?

推荐答案

是的，请参见维基百科.

SELECT employee.*, department.*
FROM   employee 
       LEFT JOIN department 
          ON employee.DepartmentID = department.DepartmentID
UNION ALL
SELECT employee.*, department.*
FROM   department
       LEFT JOIN employee
          ON employee.DepartmentID = department.DepartmentID
WHERE  employee.DepartmentID IS NULL

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