sql 工会加入

Posted 2021-05-13

SELECT *
FROM main_table AS m
INNER JOIN (
    SELECT foo_table.id, foo_table.name
    FROM foo_table
    LEFT OUTER JOIN foo_meta_table
    ON foo_table.id = foo_meta_table.id
  UNION ALL
    SELECT bar_table.id, bar_table.name
    FROM bar_table
    LEFT OUTER JOIN bar_meta_table
    ON bar_table.id = bar_meta_table.id
) AS u
ON m.id = u.id
WHERE m.title = 'hoge'