內部聯接查詢mysql更新中的語法錯誤

Question

我的查詢：

UPDATE i SET i.CurStock = i.CurStock-g.Qty  
    FROM inv_inventarymaster AS i INNER JOIN inv_goodsissue AS g  
    ON  i.ItemName = g.ItemName WHERE g.DATE='2014-03-20';

錯誤：

您的SQL語法有誤； 檢查與您的MySQL服務器版本相對應的手冊以獲取正確的語法，以在第1行的'FROM inv_inventarymaster as i INNER JOIN inv_goodsissue as g ON'附近使用

請幫助我獲得正確的語法。

Answer 1

嘗試此...未測試，但作為MYsql http://dev.mysql.com/doc/refman/5.0/en/update.html

UPDATE inv_inventarymaster AS i INNER JOIN inv_goodsissue AS g SET 
i.CurStock = i.CurStock-g.Qty 
WHERE i.ItemName = g.ItemName and g.DATE='2014-03-20';

Answer 2

在MySQL UPDATE查詢中使用FROM是不正確的。

您可以像這樣使用查詢

UPDATE inv_inventarymaster AS i 
INNER JOIN inv_goodsissue AS g  ON i.ItemName = g.ItemName 
SET i.CurStock = i.CurStock-g.Qty  
WHERE g.DATE='2014-03-20';