数据库:SQLServer分页查询整理
作为程序员来说,与数据库打交道是十分频繁的分页查询是一个开发者必须掌握的基本知识点,目前整理了下面三种SQLServer分页查询语句的写法,仅供参考。
一、Top Not IN 方式(查询靠前的数据较快)
语法格式:
select top 条数 * from tablename
where Id not in (select top pageSize*(pageIndex-1) Id
from tablename)
示例:
SELECT TOP 2 * FROM Users WHERE Id NOT IN
(SELECT TOP 2 Id FROM Users)
二、ROW_NUMBER() OVER()方式 (查询靠后的数据速度比上一种较快)
语法格式:
SELECT * FROM (SELECT *,
ROW_NUMBER() OVER(Order by Id ) AS RowNumber from tablename ) as b
where RowNumber
between pageIndex-1*pageSize and pageIndex*pageSize
示例:
SELECT * FROM (
SELECT *, ROW_NUMBER() OVER (ORDER BY Id) AS RowNumber
FROM Users ) as b where RowNumber BETWEEN 0 and 5
三、offset fetch next方式 (速度优于前两者,限制Sql2012版本以上可以使用)
语法格式:
select * from tablename
order by Id offset pageIndex row
fetch next pageSize row only
示例:
select * from Users order by Id offset 2 row
fetch next 5 row only
四、分页存储过程
create PROCEDURE GetPageData
(
@TableName varchar(30),--表名称
@IDName varchar(20),--表主键名称
@PageIndex int,--当前页数
@PageSize int--每页大小
)
AS
IF @PageIndex > 0
BEGIN
set nocount on
DECLARE @PageLowerBound int,@StartID int,@sql nvarchar(225)
SET @PageLowerBound = @PageSize * (@PageIndex-1)
IF @PageLowerBound<1
SET @PageLowerBound=1
SET ROWCOUNT @PageLowerBound
SET @sql=N'SELECT @StartID = ['+@IDName+']
FROM '+@TableName+' ORDER BY '+@IDName
exec sp_executesql @sql,N'@StartID int output',@StartID output
SET ROWCOUNT 0
SET @sql='select top '+str(@PageSize) +' * from '+
@TableName+' where ['+@IDName+']
>='+ str(@StartID) +' ORDER BY ['+@IDName+'] '
EXEC(@sql)
set nocount off
END
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