SQL UPDATE语句中的错误

Question

我想基于查找表更新事实表。事实表的Addressid需要更新并且替换为查找列的newaddress并且与查找表的oldaddress列进行比较。

我已经写了下面的SQL语句：

Update [dbo].[fact_P] 
Set Address_Id = (Select AddressID_new 
        From AddressLookup 
        Where fact_P.Address_Id = Lookup.AddressID_old) 

但它抛出一个错误。

Answer 1

您在子查询中使用错误的别名/表名引用AddressID_old列。如果我没有弄错，你应该使用AddressLookup.Address_ID_old来代替。

UPDATE [dbo].[fact_P] 
SET Address_Id = (SELECT AddressID_new FROM AddressLookup al 
        WHERE fact_P.Address_Id = al.AddressID_old) 

Answer 2

使用下面的查询UPDATE语句：

UPDATE [dbo].[fact_P] SET Address_Id = AddressID_new 
    FROM AddressLookup al 
    WHERE fact_P.Address_Id = al.AddressID_old 

Answer 3

在部分子查询，只有当它返回值1允许

。所以，如果我不是你的名字表错误理解查询是“AddressLookup”，你需要加入：

Update fp 
set fp.Address_Id=al.AddressID_new 
    from [dbo].[fact_P] fp join AddressLookup al 
     on fp.Address_Id= al.AddressID_old 

Answer 4

Update tgt 
set Address_Id = lu.Address_Id 
from [dbo].[fact_P] tgt 
inner join AddressLookup lu 
on tgt.Address_Id = lu.AddressID_old;