Sql server 为什么我的变量不改变它们的值？
我正在用T-SQL编写一个包含动态元素的大过程。为了让它简短，我只发布了重要的代码行Sql server 为什么我的变量不改变它们的值？,sql-server,tsql,dynamic-sql,Sql Server,Tsql,Dynamic Sql,我正在用T-SQL编写一个包含动态元素的大过程。为了让它简短，我只发布了重要的代码行 declare.... BEGIN while @start <= @rowcount begin print @start print @rowcount set @sqlval = 'select @zwischen1 = @currentcolumn_val1 from z_skm where id = @star
declare....
BEGIN
while @start <= @rowcount
begin
print @start
print @rowcount
set @sqlval = 'select @zwischen1 = @currentcolumn_val1
from z_skm
where id = @startid';
set @ParmDefinitionval = N'@currentcolumn_val1 nvarchar(500),
@startid int,
@zwischen1 nvarchar(50) OUTPUT';
exec sp_executesql
@sqlval,
@ParmDefinitionval,
@currentcolumn_val1 = @currentcolumn_val,
@startid = @start,
@zwischen1 = @currentval OUTPUT;
print @currentval
set @sqlkey ='select @zwischen2 = @currentcolumn_key1
from z_skm
where id = @startid';
set @ParmDefinitionkey = N'@Currentcolumn_key1 nvarchar(500),
@startid int,
@zwischen2 nvarchar(50) OUTPUT';
exec sp_executesql
@sqlkey,
@ParmDefinitionkey,
@Currentcolumn_key1 = @currentcolumn_key,
@startid = @start,
@zwischen2 = @currentkey OUTPUT;
print @currentkey
set @start = @start + 1
print'loop-end'
end
END
GO
我不知道为什么，但看起来不可能通过参数将动态_列传递到execute，它需要在..之前放入字符串中。。这对我来说毫无意义。试着像这样更改您的查询
set @sqlval = 'select '+@zwischen1+' = '+@currentcolumn_val1+'
from z_skm
where id = '+@startid;
我认为@zwischen1是一个包含列名的变量尝试这样更改您的查询
set @sqlval = 'select '+@zwischen1+' = '+@currentcolumn_val1+'
from z_skm
where id = '+@startid;
我认为@zwischen1是一个包含列名的变量尝试这样更改您的查询
set @sqlval = 'select '+@zwischen1+' = '+@currentcolumn_val1+'
from z_skm
where id = '+@startid;
我认为@zwischen1是一个包含列名的变量尝试这样更改您的查询
set @sqlval = 'select '+@zwischen1+' = '+@currentcolumn_val1+'
from z_skm
where id = '+@startid;
我认为@zwischen1是保存列名的变量如果
@currentcolumn_-val1@currentcolumn_-key1@currentcolumn_key1@currentcolumn\u key1set@var1=@var2@currentcolumn\u val1@currentcolumn\u key1@currentcolumn_key1@currentcolumn\u key1set@var1=@var2@currentcolumn\u val1@currentcolumn\u key1@currentcolumn_key1@currentcolumn\u key1set@var1=@var2@currentcolumn\u val1@currentcolumn\u key1@currentcolumn_key1@currentcolumn\u key1set@var1=@var2