分页存储过程代码-mysql教程

一个分页存储过程分享

代码如下:
/*
*@curentpage 当前页
*@pagesize 每页记录数
*@TableName 表名
*@key 主键（自动排序）
*@where 查询条件
1）空为 null
2）有查询条件不要带where
*@order '0'表示　desc '1'是asc
*@pageCount 总页数
*/
create procedure Page
@currentpage int,@pagesize int,
@TableName varchar(30),@key varchar(30),
@where varchar(50),@order varchar(1),
@pageCount int ,@str varchar(450) output
as
begin
---------------执行的sql语句------------
declare @sql nvarchar(400),@ordreby nvarchar(200)
declare @tempsql1 varchar(200),@tempsql2 varchar(200)
---------------记录总数-----------------
declare @count int
---------------临时变量------------------------
declare @temp1 int,@temp2 int

set @TableName=' '+@TableName+' '
set @key=' '+@key+' '

if @order='0'
set @ordreby=' order by '+@key+'desc'
else
set @ordreby=' order by '+@key

if @where='null'
set @sql='select @count = count(*) from '+ @TableName
else
set @sql='select @count = count(*) from '+ @TableName+' where '+@where

------------@count 付值(声明变量@count 在说明是output 内型)---------------------------
exec sp_executesql @sql,N'@count int out',@count out
------------求总页数------------------------------
if (@count%@pagesize)=0
set @pagecount=@count/@pagesize
else
set @pagecount=@count/@pagesize+1
-----------判断显示当前页是否异常------------------
if @currentpage>@pagecount
set @currentpage=@pagecount
if @currentpage<1
set @currentpage=1
----------记录数小于页面显示记录数-----------------
if(@currentpage=1)
begin
if @where='null'
set @where=' '
else
set @where=' where '+@where
set @sql = 'select top'+ str(@pagesize)+' * from '+@TableName+@where+@ordreby
end
else
begin
/**//* ---------------desc----------------------
*@temp1表示前面的记录
*@temp2表示后面的记录
*假设一共77个记录，每次取10个。取67～58（第2页），去掉前面的57（1～57）个和后面的10个（77～66）
*/
if @order=0
begin
set @temp1 = @count-@currentpage*@pagesize
if @temp1<0
set @temp1=0
set @temp2 = (@currentpage - 1)*@pagesize
if @where='null'
begin
set @tempsql1='select top ' + str(@temp1)+' '+@key+' from ' + @TableName+' order by ' +@key
set @tempsql2='select top ' + str(@temp2)+' '+@key+' from ' + @TableName + @ordreby
end
else
begin
set @tempsql1='select top ' + str(@temp1)+' '+@key+' from ' + @TableName+' where '+@where+' order by ' +@key
set @tempsql2='select top ' + str(@temp2)+' '+@key+' from ' + @TableName+' where '+@where+@ordreby
end
set @sql=' select top ' + str(@pagesize) + ' * from ' + @TableName + ' where '+@key+ ' not in '
set @sql= @sql+' ( '+ @tempsql1 +' ) and '
set @sql= @sql+@key+ ' not in ( '+@tempsql2 +' ) '
if @where='null'
set @sql= @sql+@ordreby
else
set @sql= @sql+' and '+@where+@ordreby
end
/**//* ----------------asc---------------------
* @temp 表示前面显示的记录总数
* 去掉 @temp 在取出 pagesize 个即可
*/
else
begin
set @temp1=(@currentpage-1)*@pagesize
if @where='null'
set @tempsql1='select top '+ str(@temp1)+' '+@key+' from ' + @TableName + @ordreby
else
set @tempsql1='select top '+ str(@temp1)+' '+@key+' from ' + @TableName ++' where '+@where+@ordreby
set @sql=' select top ' + str(@pagesize) + ' * from ' + @TableName + ' where '+@key+ ' not in '
set @sql=@sql+' ( '+@tempsql1+' ) '
if @where='null'
set @sql= @sql+@ordreby
else
set @sql= @sql+' and '+@where+@ordreby

end
/**//* -------------------------------------*/
end
set @str=@sql
--exec sp_executesql @sql

end

GO