使用2个内部联接进行更新

Question

我尝试根据2个内部联接更新表中的字段，但它不适用于我。我一直收到语法错误。

UPDATE t1
SET t1.value = t3.value
FROM Table1 as t1
INNER JOIN Table2 as t2 ON t1.name = t2.name
INNER JOIN Table3 as t3 ON t2.address = t3.address;

表格结构：

name  value
----  -----
bob   ***
tom   ***

name  address
----  -------
bob   100 main st
tom   200 fake dr

address      value
-----------  -------
100 main st  200
200 fake dr  400

因此值200和400是我尝试更新空白的原因。

Answer 1

UPDATE t1
SET value = t3.value
...

Answer 2

您可以使用以下

UPDATE table1 t1
SET t1.VALUE =
      (SELECT t3.VALUE
         FROM table2 t2, table3 t3
        WHERE t1.name = t2.name AND t2.address = t3.address)