Load the data for web page using "paging" query

For example, the table of "inv_master_huge" has around 1million rows and you would like to have a functionality for the user to scroll through whatever page that they want. I know this sounds like "no way" or "no user would scroll the data like this". In fact, after filtering the rows by date range for current month, you might still have around 1000 rows.  Anyway, the following query will help in improving the website response time.

The keyword is the "ROW_NUMBER() OVER (ORDER BY ...)".


create proc pr_get_inv_by_page (
    @start_idx int,
    @page_size int
)
as
begin

    select *
    from (
        select
            row_number() over (order by dt) as row_no,
            *
        from inv_master_huge
        -- you may include the date filtering clause here.

    ) as a
    where
        row_no between @start_idx and @start_idx + @page_size

end

Note: in case you allowed the user sort the data by field name, you will have to pass the select statement generated at runtime and pass it to "sp_executesql" stored proc

Sync the SQL user ID

After moving the database from one SQL server to another, the user ID (that has been created in the database) is no longer working. This is mainly due to the "SQL login ID" does not match with the "database user ID". The value that links between these ID-s are call the SID.


Before executing the fixes, you may wonder what has happened to the user ID. Execute the following query:

   use [my_database]
   go
   select * from sysusers where name = 'my_user_name'
   select * from master..syslogins where loginname = 'my_login_name'
   go


From the result, you might notice that the "sid" value in both queries are different. And this is the cause of the login problem.


In MSSQL, there is a system stored procedure that will help you to sync the SID value and it is called "sp_change_users_login".

To get the list of the mismatch user ID, execute this command.

    exec sp_change_users_login 'report'

To sync the database user ID with the SQL login ID:

   exec sp_change_users_login 'update_one', 'my_user_name', 'my_login_name'

Note: you have to replace "my_user_name" and "my_login_name" with the actual values.