the - FULL OUTER JOIN con SQLite

sqlite merge tables

Question

SQLite solo tiene INNER e LEFT JOIN.

¿Hay alguna forma de hacer un FULL OUTER JOIN con SQLite?

Answer 1

Sí, mira el ejemplo en Wikipedia .

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

Answer 2

Siguiendo el comentario de Jonathan Leffler, aquí hay una respuesta alternativa a la de Mark Byers:

SELECT * FROM table_name_1 LEFT OUTER JOIN table_name_2 ON id_1 = id_2
UNION
SELECT * FROM table_name_2 LEFT OUTER JOIN table_name_1 ON id_1 = id_2

Consulte here fuente original y otros ejemplos de SQLite.