SQL：使用选择更新表

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

我收到这样的错误

错误代码：1064
您的 SQL 语法有错误；检查与您的 MySQL 服务器版本相对应的手册，以了解在 'FROM ( 在第 7 行选择 PRODUCTID,PRD_UNIT_PRICE,PRD_SELLING_PRICE,PRD_IN_PATIENT_LIST_PRI'

我检查了select语句是否正确，但我仍然得到错误！

有什么想法吗？

Answer 1

问题解决了，解决办法在这里

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

来自：mysql update query with sub query