sql - 使用 SQLite 的完全外部连接

Question

SQLite 只有 INNER 和 LEFT JOIN。

有没有办法用 SQLite 进行 FULL OUTER JOIN？

Answer 1

是的，请参阅 Wikipedia 上的示例.

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