- 仕事; ID
- task_assign; ID、タスク ID
- task_state; id、assign_id
- 州; id、state_id、define_id
他のテーブルの選択した ID に含めたい
SELECT DISTINCT t.id,t.* FROM tasks AS t
INNER JOIN task_assign AS ta1 ON ta1.task_id=t.id
INNER JOIN task_state AS ts1 ON ts1.assign_id=ta1.id
INNER JOIN states AS s1 ON s1.id=ts1.state_id AND s1.define_id=14
INNER JOIN task_assign AS ta2 ON ta2.task_id=t.id
INNER JOIN task_state AS ts2 ON ts2.assign_id=ta2.id
INNER JOIN states AS s2 ON s2.id=ts2.state_id AND s2.define_id=21
.
.
.
INNER JOIN task_assign AS ta5 ON ta5.task_id=t.id
INNER JOIN task_state AS ts5 ON ts5.assign_id=ta5.id
INNER JOIN states AS s5 ON s5.id=ts5.state_id AND s5.define_id=25
これは機能しますが、リクエストが増えると遅くなります。別の方法はありますか?