在同一查詢中對dup進行INSERT INTO，SELECT和UPDATE

Question

我試圖使用insert和select更新重複鍵。

INSERT INTO f_s.s_d_p(dom,title,lastupdated) 
SELECT dom AS dDom, 
COUNT(db2.rets.dom) AS dcount, 
NOW() AS timeNow 
FROM db2.rets 
GROUP BY db2.rets.dom 
LIMIT 5 
ON DUPLICATE KEY UPDATE title = dDom, last_updated = NOW(); 

但是當我運行查詢我總是得到「未知列dDom」

我試圖設置一個別名，選擇查詢，但沒有運氣。

Answer 1

使用字段名稱，而不是別名：ON DUPLICATE KEY UPDATE title = db2.rets.dom, last_updated = NOW();。或者做

INSERT INTO f_s.s_d_p(dom,title,lastupdated) 
SELECT * FROM (
SELECT dom AS dDom, 
COUNT(db2.rets.dom) AS dcount, 
NOW() AS timeNow 
FROM db2.rets 
GROUP BY db2.rets.dom 
LIMIT 5) 
a 
ON DUPLICATE KEY UPDATE title = a.dDom, last_updated = NOW();