Tag: 分页预览模式: 普通 | 列表

MsSql 存储过程分页代码

作者:admin 日期:2010-03-14

SQL代码

MsSql 存储过程分页代码
--使用说明本代码适用于MsSql2000,对于其它数据库也可用.但没必要
--创建存储过程
Create PROCEDURE pagination
@tblName varchar(255), -- 表名
@strGetFields varchar(1000) = '*', -- 需要返回的列
@fldName varchar(255)='', -- 排序的字段名(可包含如TABLE.FLDNAME形式）
@PageSize int = 10, -- 页尺寸
@PageIndex int = 1, -- 页码
@doCount bit = 0, -- 返回记录总数, 非 0 值则返回
@OrderType bit = 0, -- 设置排序类型, 非 0 值则降序
@strWhere varchar(1500) = '' -- 查询条件 (注意: 不要加 where)
AS
declare @strSQL varchar(5000) -- 主语句
declare @strTmp varchar(110) -- 临时变量
declare @strOrder varchar(400) -- 排序类型
declare @fldName_t varchar(255) -- 在分页时用的排序字段名，不包含多表并列时的表名
set @fldName_t = right(@fldName,len(@fldName)-CHARINDEX('.',@fldName))
if @doCount != 0
begin
if @strWhere !=''
set @strSQL = 'select count(*) as Total from ' + @tblName + ' where '+@strWhere
else
set @strSQL = 'select count(*) as Total from ' + @tblName + ''
end
-- 以上代码的意思是如果@doCount传递过来的不是0，就执行总数统计。以下的所有代码都是@doCount为0的情况
else
begin
if @OrderType != 0
begin
set @strTmp = '<(select min'
set @strOrder = ' order by ' + @fldName +' desc'
--如果@OrderType不是0，就执行降序，这句很重要！
end
else
begin
set @strTmp = '>(select max'
set @strOrder = ' order by ' + @fldName +' asc'
end
if @PageIndex = 1
begin
if @strWhere != ''
set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from ' + @tblName + ' where ' + @strWhere + ' ' + @strOrder
else
set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from '+ @tblName + ' '+ @strOrder
-- 如果是第一页就执行以上代码，这样会加快执行速度
end
else
begin
--以下代码赋予了@strSQL以真正执行的SQL代码
set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from '+ @tblName + ' where ' + @fldName + ' ' + @strTmp + ' ('+ @fldName_t + ') from (select top ' + str((@PageIndex-1)*@PageSize) + ' '+ @fldName + ' from ' + @tblName + '' + @strOrder + ') as tblTmp)'+ @strOrder
if @strWhere != ''
set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from '+ @tblName + ' where ' + @fldName + ' ' + @strTmp + ' ('+ @fldName_t + ') from (select top ' + str((@PageIndex-1)*@PageSize) + ' '+ @fldName + ' from ' + @tblName + ' where ' + @strWhere + ' '+ @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder
end
end
exec (@strSQL)
go
--测试
create table news --建表
(
n_id int iDENTITY(1,1) primary key,
n_title char(200),
n_content text
)
--写循环插入1000000条的数据
create proc tt
as
declare @i int
set @i=0
while(@i<1000000)
begin
insert into news(n_title,n_content) values('sb','dsfsdfsd')
set @i=@i+1
end
exec tt
exec pagination 'news','*','n_id',1000,2,0,0,''
自己改写的一个分页存储过程
Create PROC Paging
(
@pageSize int,
@pageIndex int,
@pageField nvarchar(32),
@countTotal bit=1,
@fieldQuery nvarchar(512),
@tableQuery nvarchar(512),
@whereQuery nvarchar(2048),
@orderQuery nvarchar(512)
)
AS
DECLARE @bdate Datetime
SET @bdate = getdate()
DECLARE @itemcount int
SET @itemcount=@pageIndex*@pageSize
DECLARE @itemlowwer int
SET @itemlowwer=(@pageIndex-1)*@pageSize
DECLARE @cmd nvarchar(3062)
IF @pageIndex=1
SET @cmd ='Select TOP ‘+CAST(@pageSize AS NVARCHAR)+' ‘+@fieldQuery+' FROM ‘+@tableQuery+' Where ‘+@whereQuery+' ORDER BY ‘+@orderQuery
ELSE
SET @cmd='Select ‘+@fieldQuery+' FROM ‘+@tableQuery+' Where ‘+@pageField+' IN (Select TOP ‘+CAST(@itemcount as nvarchar)+' ‘+@pageField+' FROM ‘+@tableQuery+' Where ‘+@whereQuery+' ORDER BY ‘+ @orderQuery+')
AND ‘+@pageField+' NOT IN (Select TOP ‘ +CAST(@itemlowwer as nvarchar)+' ‘+@pageField+' FROM ‘+@tableQuery+' Where ‘+@whereQuery+' ORDER BY ‘+ @orderQuery+')'
–print @cmd
EXEC(@cmd)
Select DATEDIFF( ms , @bdate , getdate() )
IF @countTotal =1
BEGIN
SET @cmd = ‘Select COUNT( 0) FROM ‘+@tableQuery+' Where ‘+@whereQuery
EXEC(@cmd)
END
GO