Passing two values to a stored procedure? - sql

Question

I've written a stored procedure which is called on a link which provides a date value every time and #cg is NULL that time to filter the result on a particular date.
DECLARE #return_value int
EXEC #return_value = [dbo].[Get_Mydata]
#cg = NULL,
#tosearch = '15-05-2014'
SELECT 'Return Value' = #return_value
GO
And after first execution of the stored procedure, it gives some results and using same stored procedure.
I need to filter result by passing below parameter so this time #cg is NOT NULL.
DECLARE #return_value int
EXEC #return_value = [dbo].[Get_Mydata]
#cg = 'CUSTOMER NAME',
#tosearch = 'manish'
SELECT 'Return Value' = #return_value
GO
I'm not able to figure how should I create a dynamic where clause and add it to existing query as well as how to pass value to same parameter which already been passed as date.
More like first getting results for a particular date and then applying like filter on that result. I cannot pass different parameter that's Front end developers requirement.
This is my stored procedure and table data here. http://sqlfiddle.com/#!3/bb917
create proc Get_Mydata
(
#cg varchar(50),
#tosearch varchar(50)
)
as
begin
set nocount on
declare #sqlquery nvarchar(max)
set #sqlquery = N'select q_no, trandate, cust_name from testsp where CONVERT(Date, trandate, 103) = CONVERT(Date, ''' + #tosearch + ''' ,103)';
create table #temp1
(
q_no int,
trandate datetime,
cust_name varchar(50)
)
insert into #temp1(q_no, trandate, cust_name)
exec (#sqlquery)
select * from #temp1 as T;
set nocount off
end

Answer 1

What I have understood is that you want stored procedure to filter results on Date column when you pass null to #cg param and you want to filter results on Cust_name when you pass string 'Cust_Name' to your #Cg Param.
It should be fairly simple, But in any case you do not need a temp table to get the results back its just an over kill of a fairly simple query.
I would do something like this....
Pass the column name to #ColumnName Parameter, and your value to #tosearch parameter. It will build the query depending on what values you pass.
Make sure when you pass a value(Column Name) to #ColumnName.
create proc Get_Mydata
(
#ColumnName varchar(50),
#tosearch varchar(50)
)
as
begin
set nocount on;
declare #sqlquery nvarchar(max);
set #sqlquery = N' select q_no, trandate, cust_name '
+ N' from testsp '
+ N' where ' + QUOTENAME(#ColumnName) + N' = '
+ CASE
WHEN #ColumnName = 'trandate'
THEN N' CAST(#tosearch AS DATE)'
WHEN #ColumnName = 'cust_name'
THEN N' #tosearch'
ELSE N'' END
EXECUTE sp_executesql #sqlquery
,N'#tosearch varchar(50)'
,#tosearch
set nocount off;
end