Question

我有以下存储过程：

Create PROCEDURE [dbo].[GETVendorsStatsAgainstSearTerm]
    @Date DateTime , 
    @SearchId  bigint
AS

declare @cmd as varchar(2000)
set @cmd = ' select *, ' + cast(SearchId as varchar) + ' as SearhId   from tbl'
exec (@cmd)

我想将SearchId视为要运行select查询的列。我想知道SearchId列的正确类型。

我无法将此SearchId列转换为C＃中的长数据类型。有人能帮助我吗？

Answer 1

您可以尝试使用Convert function

Convert(varchar(50),SearchId )

Answer 2

我想问题是有一些未分配的SearchId会导致将一个null转换为varchar。

尝试这样的事情：

//...
set @cmd = CASE
   WHEN (SearchId IS NOT NULL) THEN (' select *, ' + cast(SearchId as varchar) + ' as SearhId from tbl')
   ELSE ' select *, 0 as SearhId from tbl'
END
///...

无效的演员表异常？

2 个答案: