Question

我正在使用SQL Server 2012，我有一个存储过程。我收到上述错误的最后一部分是这部分：

Set @SQL = '
Select Style=case when AttNr = 2 then '''' else Entity end'+@SQL+' 
 From  #Temp 
 Where Entity not in (Select Entity From #Temp Where AttNr=2 Group By Entity Having Sum(cast(Value as bigint))=0) 
 Group By Entity,AttNr 
 Order By Entity,AttNr
'

我哪里错了？

更新至：

Set @SQL = '
Select Style=case when AttNr = 2 then '''' else Entity end'+@SQL+' 
 From  #Temp 
 Where Entity not in (Select cast(Entity as varchar(100)) From #Temp Where AttNr=2 Group By Entity Having Sum(cast(Value as bigint))=0) 
 Group By Entity,AttNr 
 Order By Entity,AttNr
'

我必须做些蠢事 - 改为：

Set @SQL = '
Select Style=case when AttNr = ''2'' then '''' else Entity end'+@SQL+' 
 From  #Temp 
 Where Entity not in (Select cast(Entity as varchar(100)) From #Temp Where AttNr=2 Group By Entity Having Sum(cast(Value as bigint))=0) 
 Group By Entity,AttNr 
 Order By Entity,AttNr
'

好的，我改到了下面：

Set @SQL = '
Select Style=case when AttNr = ''2'' then '''' else cast(Entity as varchar(100)) end'+@SQL+' 
 From  #Temp 
 Where Entity not in (Select cast(Entity as varchar(100)) From #Temp Where AttNr=''2'' Group By Entity Having Sum(cast(Value as bigint))=0) 
 Group By Entity,AttNr 
 Order By Entity,AttNr
'

但仍然没有 - 同样的错误。

谢谢，

迈克尔

Answer 1

DO

cast(Entity as varchar(100))

您收到错误是因为Case遵循数据类型优先级。然后，Then和Else中的值将转换为具有更高优先级的相同数据类型

以下示例：

Declare @a int=1
select case when @A=1 then '''' else cast(@a as varchar(10)) end

错误：
将varchar值'''转换为数据类型int时，转换失败。

也有可能，AttNr有一些varchar值，所以如果是这样的话，请尝试隐式转换为varchar。

AttNr ='2“

Answer 2

也许您的数据为空，无法转换为bigint .... 只需在查询中替换这段代码......

SUM((CAST(ISNULL(Value , '0') as bigint)))

为任何应该施放的空值执行...

SQL存储过程错误将数据类型varchar转换为bigint

2 个答案: