数据库分页代码

Posted 2020-08-03 一棵小草77

数据库分页代码

mysql：

select * from table limit 0,10;
-- 查询10条记录，0-开始位置，1-结束位置，注：从0开始

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oracle：

第一种（利用rownum伪列进行查询）：
SELECT * FROM 
(
                   SELECT A.*, ROWNUM RN 
                   FROM (SELECT * FROM TABLE_NAME) A 
                   WHERE ROWNUM <= 20
)
WHERE RN >= 10;

第二种：
select * from (select e.*,rownum  r from  (select * from emp order by sal desc) e ) e1 where e1.r>10 and e1.r<=20;

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Sql Server：

第一种（利用Not In和SELECT TOP分页）：
SELECT TOP 10 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 20 id
FROM TestTable
ORDER BY id))
ORDER BY ID
 
SELECT TOP 页大小 *
FROM TestTable
WHERE (ID NOT IN
(SELECT TOP 页大小*页数 id
FROM 表
ORDER BY id))
ORDER BY ID

第二种（利用ID大于多少和SELECT TOP分页）：
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 页大小 *
FROM TestTable
WHERE (ID >
(SELECT MAX(id)
FROM (SELECT TOP 页大小*页数 id
FROM 表
ORDER BY id) AS T))
ORDER BY ID

第三种（利用SQL的游标存储过程分页）：
create procedure XiaoZhengGe
@sqlstr nvarchar(4000), --查询字符串
@currentpage int, --第N页
@pagesize int --每页行数
as
set nocount on
declare @P1 int, --P1是游标的id
@rowcount int
exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@rowcount=@rowcount output
select ceiling(1.0*@rowcount/@pagesize) as 总页数--,@rowcount as 总行数,@currentpage as 当前页
set @currentpage=(@currentpage-1)*@pagesize+1
exec sp_cursorfetch @P1,16,@currentpage,@pagesize
exec sp_cursorclose @P1
set nocount off

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