我的這段代碼是大資料量時提高分頁的效率的測試代碼
--提高分頁效率:實現分頁時唯讀取顯示資料,需要先在資料庫建立資料庫“TestForPaging”
use TestForPaging
go
--建立表SomeData
create table SomeData
(
id int primary key,
name varchar(30) null,
description text
)
go
--插入資料
insert into SomeData values(1,'num1','第1條')
go
insert into SomeData values(2,'num2','第2條')
go
insert into SomeData values(3,'num3','第3條')
go
insert into SomeData values(4,'num4','第4條')
go
insert into SomeData values(5,'num5','第5條')
go
--資料條目總數
select count(*) from SomeData
go
--給每條記錄添加一個資料層級
select name,description,ROW_NUMBER() over(order by id desc)as dataLevel from SomeData
go
--查看指定的資料層級間的資料條目
select dataLevel,name,description from
(select name,description,row_number() over(order by id desc)as dataLevel from SomeData)
as datawithleverl where dataLevel between 2 and 4
go
--實現查看指定的資料層級間的資料條目的預存程序
create procedure GetDataPaged
(
@startRowIndex int,
@maximumRows int,
@sort varchar
)
AS
--確保指定sort
if len(@sort)=0
set @sort='id'
--帶參數的查詢
select dataLevel,name,description from
(select name,description,row_number() over(order by @sort desc)as dataLevel from SomeData) AS datawithleverl
WHERE dataLevel > (@startRowIndex*10) AND dataLevel <= (@startRowIndex*10 + @maximumRows)
go