Sql server sp_executesql不返回值
我需要能够列出给定表的列列表。 当我运行以下命令时:Sql server sp_executesql不返回值,sql-server,tsql,Sql Server,Tsql,我需要能够列出给定表的列列表。 当我运行以下命令时: DECLARE @ColList Varchar(Max) DECLARE @TabName varchar(100) = 'CT_CONF' SELECT @ColList = CASE WHEN @ColList IS NULL THEN '''' ELSE @ColList + ',' END + column_name from INFORMATION_SCHEMA.COLUMNS
DECLARE @ColList Varchar(Max)
DECLARE @TabName varchar(100) = 'CT_CONF'
SELECT @ColList = CASE WHEN @ColList IS NULL THEN '''' ELSE @ColList + ',' END + column_name
from INFORMATION_SCHEMA.COLUMNS
where TABLE_NAME = @TabName
and DATA_TYPE not in ('xml','Text','Image','Geometry','Geography')
and COLUMN_NAME not in ('LAST_MODIFIED')
order by ordinal_position
select @ColList
我得到了所需的输出,但是,当我尝试按如下方式运行sp_executesql时,什么也没有得到
DECLARE @TabName varchar(100) = 'CT_CONF'
DECLARE @SQL NVarchar(Max)
DECLARE @ColList Varchar(Max)
Declare @Params nvarchar(Max)
SET @SQL = N'
select @ColList = CASE WHEN @ColList IS NULL THEN '''' ELSE @ColList + '','' END + column_name
from INFORMATION_SCHEMA.COLUMNS
where TABLE_NAME = ''@TabName ''
and DATA_TYPE not in (''xml'',''Text'',''Image'',''Geometry'',''Geography'')
and COLUMN_NAME not in (''LAST_MODIFIED'')
order by ordinal_position
'
set @Params = N'@ColList varchar(Max) OUTPUT'
EXEC sp_executesql @SQL, @Params, @ColList OUTPUT
select @ColList
我做错了什么
谢谢,
尤金试试:
'...
where TABLE_NAME = ''' + @TabName + '''
...'
或者(可能更好):
这些实际上只是注释中@Mikael Eriksson建议的实现。您有名为
@SourceTable
的表吗?我的错,应该是@TabName。我做了一个改变。仍然不起作用。您需要将表名连接到动态查询中,或者将其作为参数传递。现在,它正在寻找一个名为@TabName
的表,而它应该寻找CT\u CONF
。只是尝试了“where table\u NAME=”CT\u CONF',仍然没有成功
'...
where TABLE_NAME = @TabName
...'
set @Params = N'@TabName varchar(100), @ColList varchar(Max) OUTPUT'
EXEC sp_executesql @SQL, @Params, @TabName, @ColList OUTPUT