Question

我有三张桌子：a，b，c。表b是a和c的映射表。我正在尝试更新table a column = table c列。

实施更新时，收到错误：

[S0001] [4104]无法绑定多部分标识符

UPDATE table_a
SET table_a.Sector = table_c.Sector
FROM table_a
INNER JOIN table_b
  ON table_a.business_ID = cast(table_b.business_id as BIGINT)
INNER JOIN table_c
  ON table_b.ACARA_SML_ID = table_c.ACARA_SML_ID
WHERE a.State = 'ABC';

我感谢任何帮助。

Answer 1

直接从SELECT子句使用UPDATE语句：

 UPDATE table_a SET table_a.Sector = C.Sector
 FROM table_c C
 WHERE EXISTS
 ( SELECT 1 FROM table_b B B.ACARA_SML_ID = C.ACARA_SML_ID AND 
              table_a.business_ID = CAST(B.business_id AS BIGINT)
 ) AND A.[STATE] = 'ABC'

Answer 2

在您使用WHERE的{{1}}子句中，此处a.State未设置为任何表的表别名。

您可以使用正确的表别名尝试此查询：

使用映射表从多个联接更新表列

2 个答案: