如何从商店程序中获取表结果？

Question

I have tried to write the store procedure with some condition check inside the Where syntax.

But it only shows the status of the query instead of result.

Could any body help to resolve this issue.

Please find the query

declare @query varchar(200)
declare @option varchar(10) = 'A'
set @query ='select * from TableName'+
(case when @query = ''
then
'where ColumnName = 1 '
end)
execute sp_sqlexec @query

Answer 1

Your query should be

declare @query varchar(200)
declare @option varchar(10) ='A'
declare @search as int=1 

select @query ='select * from TableName '+
case when @option ='A'
then
' where ColumnName = '+ cast(@search as varchar(200))
else ''
end
execute sp_sqlexec @query

see demo

Answer 2

What i can see for sure is lack of space before where condition.

declare @query varchar(200)
declare @option varchar(10) = 'A'
set @query ='select * from TableName'+
(case when @query = ''
then
' where ColumnName = 1 '
end)

Answer 3

You can try like this :

declare @query varchar(200)

declare @option varchar(10) = 'A'

set @query ='select * from TableName '

if @option ='A'
   set @query = @query + ' where ColumnName = 1 '

--print @query

execute sp_sqlexec @query

Answer 4

declare     @query  nvarchar(max)
        ,   @option varchar(10)     = 'A';

set @query = N'select * from TableName '
           + CASE WHEN @option IS NOT NULL
                THEN N' where ColumnName = 1 ' ELSE N'' END

execute sp_executesql @query;

Avoid using sp_sqlexec it is very old and not supported anymore, use sp_executesql instead.