Question

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Equivalent of LIMIT and OFFSET for SQL Server?

I am working on a table which currently contains 2500 rows, and will be much more and more in future.

I am using jqgrid to display the records from the database .

Whenever the grid is loading, I am retrieving the top 500 rows from the database. However when I am started using pagination in the grid, the number of records is adding.

Example : first the number of rows is TOP 100, then going onto the next page its increased to TOP 200 and so on in the query.

Now I want a solution to avoid this issue such that I can limit the rows instead of retrieving top n rows based on the grid. Say using a range or LIMIT

Example

When I am navigating to next page in grid, instead of TOP 200 rows I want to fetch rows from 101 to 200

 select top 500
        exe.id,
        bat.BName,
        bat.tid,
        bat.freq,
        exe.status,
        exe.Msg,
        exe.time,
        exe.Fi
    from
       XXX exe,
        YYY bat 
    where
        exe.id=bat.id   
    order by     
        CONVERT(VARCHAR(10),
        exe.time,
        120) DESC,
        exe.status,
        exe.id DESC

Please guide me in this, as I am new to jQGrid and not much aware how to handle this DB related stuff

I also referred few links in Stackoverflow but can’t understand

Thanks in advance

Answer 1

You can use ROW_NUMBER(), the row_number() is not assigned until you query the data so if you want to retrieve the data by the row_number() value, then you will need to use CTE or a sub-select to get the value for use in a WHERE clause.

SELECT *
FROM
(
  select  exe.id,
        bat.BName,
        bat.tid,
        bat.freq,
        exe.status,
        exe.Msg,
        exe.time,
        exe.Fi,
        row_number() over(order by CONVERT(VARCHAR(10), exe.time, 120) DESC,
                   exe.status, exe.id DESC) rn
  from XXX exe,
       YYY bat 
  where exe.id=bat.id  
) x
WHERE rn between 101 and 200

I would also suggest a change in your JOIN syntax to use ANSI syntax:

SELECT *
FROM
(
  select  exe.id,
        bat.BName,
        bat.tid,
        bat.freq,
        exe.status,
        exe.Msg,
        exe.time,
        exe.File,
        row_number() over(order by CONVERT(VARCHAR(10), exe.time, 120) DESC,
                   exe.status, exe.id DESC) rn
  from XXXexe
  INNER JOIN  YYY bat 
     ON exe.id=bat.id  
) x
WHERE rn between 101 and 200