[mysql]SQL查詢存在A表但不存在B表的資料
阿新 • • 發佈:2019-08-21
select * from ti_road_node_code a where a.road_node_id not in ( select en_road_node_id from ti_road_node_relation b)
- 15毫秒
select * from ti_road_node_code a left join ti_road_node_relation b where a.road_node_id =en_road_node_id and isnull(b.ex_road_node_id) - 報錯
select a.* from ti_road_node_code a left join ti_road_node_relation b on a.road_node_id =b.en_road_node_id where isnull(b.ex_road_node_id)
- 282毫秒
- select a.* from ti_road_node_code a left join ti_road_node_relation b on a.road_node_id =b.en_road_node_id where
- isnull(b.en_road_node_id)
- 一樣
SELECT a.* FROM ti_road_node_code a WHERE NOT EXISTS (SELECT 1 FROM ti_road_node_relation b WHERE b.en_road_node_id = a.road_node_id)
- 540毫秒