Question

On a winform, in a datagrid, I am displaying about 100k rows, selected from the DB. Showing all these records take a lot of time. Is there a way to make the select query faster or maybe load the first 200 records. And then if the users click the next button, the next 200 records will be displayed. Is this possible? I know mysql has LIMIT, but I need something to work for sql-server 2008.

Answer 1

Stored Proc

Alter Proc Test
@PageNumber int,
@PageSize int

as

create table #t
(
    id int
)
insert into #t(id)values(1)
insert into #t(id)values(2)
insert into #t(id)values(3)
insert into #t(id)values(4)
insert into #t(id)values(5)
insert into #t(id)values(6)
insert into #t(id)values(7)
insert into #t(id)values(8)
insert into #t(id)values(9)
insert into #t(id)values(10)

declare @StartIndex int
declare @EndIndex int
declare @PageSizeIndex int

Set @StartIndex = ((@PageNumber - 1) * @PageSize) + 1
Set @EndIndex = @PageNumber * @PageSize

Select RowID, ID From
(
    Select ROW_NUMBER() Over(Order by id) as RowID, ID From #t
)K
Where K.RowID >= @StartIndex and k.RowID <= @EndIndex

Drop table #t

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Testing Purpose Data testing

Test 1, 3

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In addition to the above Stored Proc, You can implement Indexes to make the search fast or you can use SQL Profiler to check the reason for delay in execution time.