More Then One Option Incorporated Into SP

Hello all

I would like to add a couple more fields that the users can query by, more options how would I add in the same stored proecedure, First Name, Date, and IR#?? so they can have the ability to run it by one field or two fields or all the above?? how would I incorporate those in the stored procedure??



CREATE PROCEDURE [SearchByDateExcls]
(@StartDate datetime,
@EndDate datetime)
AS SELECT [IR Number], Date, Inspector, Violation, [Violation Type], Loss, [Loss Type]
FROM dbo.Revised_MainTable
GROUP BY [IR Number], Date, Inspector, Violation, [Violation Type], Loss, [Loss Type]
HAVING (Date BETWEEN @StartDate AND @EndDate)








is this correct

CREATE PROCEDURE [SearchByDateExcls]
(@StartDateServed datetime,
@EndDateServed datetime, @Enter_LastName nvarchar(25), @Enter_Duration nvarchar(10))
AS SELECT IR#, [Date Served], [Reason For Exclusion], Duration, [First Name], [Last Name]
FROM [dbo].[Extended Exclusions]
GROUP BY IR#, [Date Served], [Reason For Exclusion] , Duration, [First Name], [Last Name]
HAVING (Date BETWEEN @StartDateServed AND @EndDateServed, Enter_LastName, @Enter_Duration)