我有两张桌子
table1(id,item,price)值:
id | item | price ------------- 10 | book | 20 20 | copy | 30 30 | pen | 10
.... table2(id,item,price)值:
id | item | price ------------- 10 | book | 20 20 | book | 30
现在我要:
update table1 set table1.Price = table2.price where table1.id = table2.id and table1.item = table2.item.
我该怎么做?
这样的事情应该做到:
UPDATE table1 SET table1.Price = table2.price FROM table1 INNER JOIN table2 ON table1.id = table2.id
您也可以尝试以下操作:
UPDATE table1 SET price=(SELECT price FROM table2 WHERE table1.id=table2.id);