SQL Server paging Daquan and Efficiency Analysis

1. Paging solution 1: (use not in and select top pages)

Statement format:
Select top 10 *
From testtable
Where (id not in
(Select top 20 ID
From testtable
Order by ID ))
Order by ID

Select top page size *
From testtable
Where (id not in
(Select top page size * Page ID
From table
Order by ID ))
Order by ID

2. Paging solution 2: (use the ID greater than the number of pages and select top pages)

Statement format:
Select top 10 *
From testtable
Where (ID>
(Select max (ID)
From (select top 20 ID
From testtable
Order by ID) as t ))
Order by ID

Select top page size *
From testtable
Where (ID> (select max (ID)
From (select top page size * Page ID
From table
Order by ID) as t ))
Order by ID

3. Paging solution 3: (using SQL cursor Stored Procedure paging)

Createprocedure sqlpager
@ Sqlstr nvarchar (4000), -- query string
@ Currentpage int, -- page n
@ Pagesize int -- number of lines per page
As
Set nocount on
Declare @ P1 int, -- P1 is the cursor ID
@ Rowcount int
Exec sp_cursoropen @ P1 output, @ sqlstr, @ scrolopt = 1, @ ccopt = 1, @ rowcount = @ rowcount output
Select ceiling (1.0 * @ rowcount/@ pagesize) as total number of pages --, @ rowcount as total number of rows, @ currentpage as current page
Set @ currentpage = (@ currentpage-1) * @ pagesize + 1
Exec sp_cursorfetch @ P1, 16, @ currentpage, @ pagesize
Exec sp_cursorclose @ p1
Set nocount off

Other solutions: If there is no primary key, you can use a temporary table or solution 3, but the efficiency is low.
We recommend that you add primary keys and indexes during optimization to improve query efficiency.

The SQL query Analyzer displays a comparison: My conclusion is:
Paging solution 2: (using more than ID and select top pages) is the most efficient. You need to splice an SQL statement
Paging solution 1: (using not in and select top pages) The efficiency is second, and SQL statements need to be spliced.
Paging solution 3: (using SQL cursor Stored Procedure paging) The efficiency is the worst, but the most common