Stored Procedure for search criteria

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Hi,
I have these tables
SCHOOL- (SchoolID,SchoolName,City,Phone, Description)
PROGRAM- (ProgramID, ProgramName)
COURSE-(CouseID,CourseName)
SCHOOL_PROGRAM_COUSRE - (CourseID,SchoolID,ProgramID,CourseFee,SchoolCourseName)
CATEGORY - (CategoryID,CategoryName)

Now the data which user is entering in the search box are-
1.CategoryName
2.SchoolName
3.CourseName
4.CourseFee

He can enter one,two or maybe three options for search

Now the result which is coming to user are coming from two tables i.e SCHOOL and SCHOOL_PROGRAM_COURSE and the columns which should be displayed to user are-

City, Phone, Description, SchoolCourseName

How to make store procedure for this? I am doing these from last 1 week but failed every time.Please help ASAP.

Thanks

Posted 17-Apr-12 14:34pm

nidhi30

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Gordon Kushner · Answer 1 · 2012-04-17T15:01:00

Solution 1

To do this using a stored procedure and avoiding dynamic SQL, I recommend your parameters have default NULL values

For example:

SQL

@SchoolName varchar(50) = NULL

If the user does not choose a school name, then don't pass it in.

In the SELECT statement, do your joins:

SQL

SELECT S.*, SPC.*
FROM SCHOOL S
INNER JOIN SCHOOL_PROGRAM_COURSE SPC ON S.SchoolID = SPC.SchoolID
INNER JOIN PROGRAM P ON P.ProgramID = P.ProgramID
...

And the magic happens in the WHERE clause:

WHERE (@SchoolName IS NULL OR S.SchoolName = @SchoolName)
  AND (@(other parameter) IS NULL OR ...)

Hope that helps.

Posted 17-Apr-12 15:01pm

Gordon Kushner

Comments

nidhi30 17-Apr-12 21:37pm

Thank you so much.

nidhi30 18-Apr-12 5:52am

I have done like this

@CategoryName nvarchar(100) = null,
@ProgramName nvarchar(50) = null,
@CourseFee money = null,
@CourseName nvarchar(100) = null,
@City nvarchar(30) = null,
@SchoolName nvarchar(100) = null

AS
SELECT S.SchoolName,S.City,S.Suburb,S.Description, SPC.SchoolCourseName
FROM SCHOOL S
INNER JOIN SCHOOL_PROGRAM_COURSE SPC ON S.SchoolID = SPC.SchoolID
INNER JOIN PROGRAM P ON P.ProgramID = P.ProgramID
INNER JOIN COURSE C ON C.CourseID = C.CourseID
INNER JOIN CATEGORY CA ON C.CategoryID = CA.CategoryID

WHERE (@SchoolName IS NULL OR S.SchoolName = @SchoolName)
AND (@CategoryName IS NULL OR CA.CategoryName = @CategoryName)
AND (@CourseName IS NULL OR C.CourseName = @CourseName)
AND (@CourseFee IS NULL OR SPC.CourseFee = @CourseFee)
AND (@City IS NULL OR S.City = @City)

While executing this query returns same row,containing same data four five times :(

Gordon Kushner 18-Apr-12 9:41am

Add the DISTINCT keyword.

SELECT DISTINCT S.SchoolName,S.City,S.Suburb,S.Description, SPC.SchoolCourseName

thotanagu · Answer 2 · 2012-04-18T00:44:00

Solution 2

Use group by clause on any of the column.

Posted 18-Apr-12 0:44am

thotanagu