SQL：与选择

Question

更新表我有这样

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 

查询我得到错误这样

错误代码：1064
您的SQL语法错误;检查对应于你的MySQL服务器版本的线条“（ SELECT PRODUCTID，PRD_UNIT_PRICE，PRD_SELLING_PRICE，PRD_IN_PATIENT_LIST_PRI”附近使用正确的语法手册7

我做了检查select语句是正确的，但我！？仍然得到错误

任何想法

Answer 1

问题解决了，这里是解决方案

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 

从指：mysql update query with sub query