Question

I have a rather expensive query that returns a page of results:

SELECT * FROM 
    (SELECT         
        ROW_NUMBER() OVER (ORDER BY j.PostDate DESC) as Row,                                            
        FROM 
            JobListing j, 
            Location l, 
            City c,
            JobListing_Skill_XREF js,
            @SkillTable st            
        WHERE 
            DistanceBetween(@lat,@long, c.Lat,c.Long) <= @miles AND
            js.Skill_ID = st.id AND                     
            j.location = l.id AND
            j.id = js.JobListing_Id AND         
            l.CityID = c.Id             
    ) AS RESULTS
    WHERE Row Between (@PageNumber - 1) * @PageSize + 1 and (@PageNumber * @PageSize)

What I would like to do is also return the total count of the inner query so that I can calculate total pages.

However, I can’t figure out how to thread a COUNT clause into it, and I really don’t want to have to select this into a temp table or run it twice just to calculate page count.

Any Ideas?

Answer 1

SELECT * FROM 
        (SELECT                 
                ROW_NUMBER() OVER (ORDER BY j.PostDate DESC) as Row,
                COUNT(*) OVER() AS total
                FROM 
                        JobListing j, 
                        Location l, 
                        City c,
                        JobListing_Skill_XREF js,
                        @SkillTable st                    
                WHERE 
                        DistanceBetween(@lat,@long, c.Lat,c.Long) <= @miles AND
                        js.Skill_ID = st.id AND                                         
                        j.location = l.id AND
                        j.id = js.JobListing_Id AND                     
                        l.CityID = c.Id                         
        ) AS RESULTS
        WHERE Row Between (@PageNumber - 1) * @PageSize + 1 and (@PageNumber * @PageSize)