我正在尝试实现“复杂”的SQL删除查询,但它无法正常工作。
这是我的疑问:
DELETE
FROM Market_Commodity_Price_Series AS MC_PS
INNER JOIN MarketDetails_CommodityDetails AS MD_CD
ON MC_PS.market_commodity_details_id = MD_CD.id
INNER JOIN MarketDetails AS MD
ON MD_CD.market_details_id = MD.id
WHERE
MD.localization_id = 1
我想只删除 Market_Commodity_Price_Series 中的所有行,但是要使用此WHERE条件。正如您可以看到where条件使用某些JOIN操作。
问题是执行此查询我收到此错误消息:
#42000您的SQL语法有错误;检查与MySQL服务器版本对应的手册,以便在第2行“AS MC_PS INNER JOIN MarketDetails_CommodityDetails AS MD_CD ON MC_PS.mar”附近使用正确的语法
我该如何解决这个问题?也许使用它作为子查询:
SELECT MC_PS.id
FROM Market_Commodity_Price_Series AS MC_PS
INNER JOIN MarketDetails_CommodityDetails AS MD_CD
ON MC_PS.market_commodity_details_id = MD_CD.id
INNER JOIN MarketDetails AS MD
ON MD_CD.market_details_id = MD.id
WHERE
MD.localization_id = 1
(使用ID)
但是如何?
答案 0 :(得分:2)
您想删除MC_PS,因此在删除缺少的“MC_PS”后写入
DELETE MC_PS
FROM Market_Commodity_Price_Series AS MC_PS
INNER JOIN MarketDetails_CommodityDetails AS MD_CD
ON MC_PS.market_commodity_details_id = MD_CD.id
INNER JOIN MarketDetails AS MD
ON MD_CD.market_details_id = MD.id
WHERE
MD.localization_id = 1