Home/ Questions/Q 6761591
In Process

The Archive Base Latest Questions

Editorial Team
  • 0
Asked: 2026-05-26T14:12:40+00:00

I have more than 30,000 rows in a table. It takes a lot of

  • 0

I have more than 30,000 rows in a table. It takes a lot of time to load all the data in the gridview. So I want to display 100 rows at a time. When I click next page button, another 100 rows should be displayed. When I click previous page button, previous 100 rows should be displayed. If I type page 5 in a text box, then I want to jump over to the 5th lot of rows.

I also want to display how many pages there will be. Can we implement this concept in vb.net [winform] gridview. I am using database PostgreSQL.

Can anybody give me a hint or some concept?

Share

Leave an answer

You must login to add an answer.

Need An Account,

1 Answer

  1. Editorial Team

    Look at OFFSET and LIMIT in PostgreSQL.
    Your query for the 5th page could look like this:

    SELECT * 
FROM   tbl
ORDER  BY id
OFFSET 400
LIMIT  100;

    id is the primary key in my example, therefore an index is in place automatically.
    If you access the table a lot in this fashion, performance may profit from using CLUSTER.

    Total number of pages:

    SELECT ceil(1235::real / 100)::int
FROM   tbl;

    If you wanted the number rounded down, just simplify to:

    SELECT 1235  / 100
FROM   tbl;

    With both numbers being integer the result will be an integer type and fractional digits truncated automatically. But I think you need to round up here.

    • 0