Question

我有这样的查询

UPDATE t_prd_cost_compare 
SET 
    2015_AUG_PRD_UNIT_PRICE=i.PRD_UNIT_PRICE, 
    2015_AUG_PRD_SELLING_PRICE=i.PRD_SELLING_PRICE,
    2015_AUG_PRD_IN_PATIENT_LIST_PRICE=i.PRD_IN_PATIENT_LIST_PRICE,
    2015_AUG_PRD_OUT_PATIENT_LIST_PRICE=i.PRD_OUT_PATIENT_LIST_PRICE
FROM (
    SELECT PRODUCTID,PRD_UNIT_PRICE,PRD_SELLING_PRICE,PRD_IN_PATIENT_LIST_PRICE,PRD_OUT_PATIENT_LIST_PRICE
    FROM t_product_catalog
    LEFT JOIN T_adjust ON IAJ_PRODUCTID=PRODUCTID AND IAJ_ADJNO IS NULL
    WHERE PRODUCTID>1 AND (DATE(IAJ_DATE) = '2015-01-01')
    GROUP BY IAJ_PRODUCTID
    ) AS i
WHERE i.PRODUCTID = t_prd_cost_compare.PRODUCTID

我得到这样的错误

错误代码：1064
您的SQL语法有错误;检查与您的MySQL服务器版本对应的手册，以便在'FROM（'附近使用正确的语法在第7行选择PRODUCTID，PRD_UNIT_PRICE，PRD_SELLING_PRICE，PRD_IN_PATIENT_LIST_PRI'

我已经检查过select语句是否正确，但我仍然收到错误！

有什么想法吗？

Answer 1

问题解决了，这是解决方案

Update
  Competition as C
  inner join (
    select CompetitionId, count(*) as NumberOfTeams
    from PicksPoints as p
    where UserCompetitionID is not NULL
    group by CompetitionID
  ) as A on C.CompetitionID = A.CompetitionID
set C.NumberOfTeams = A.NumberOfTeams

参考：mysql update query with sub query

SQL：使用select更新表

1 个答案: