高效分页方法代码

急迅分页方法代码(sql百万级数据量分页代码卡塔尔

@querystr nvarchar(300State of Qatar,–表名、视图名、查询语句@pagesize
int=10,–每页的轻重(行数卡塔尔@pagecurrent int=1,–要来得的页@fdshow nvarchar
(100卡塔尔=”,–要展示的字段列表,假如查询结果有标志字段,供给指

定此值,且不含有标记字段@fdorder nvarchar
(100State of Qatar=”,–排序字段列表@wherestr nvarchar (200卡塔尔(قطر‎=”, –内容是’ id=3 and
model_no like ‘%24%’

and ‘@rscount int=0 output asset @fdshow=’ ‘+@fdshow+’ ‘set @fdorder= ‘
‘+@fdorder+’ ‘set @wherestr= ‘ ‘+@wherestr+’ ‘

declare @fdname nvarchar(250卡塔尔(قطر‎–表中的主键或表、有时表中的标记列名,@id1
varchar(20卡塔尔(قطر‎,@id2 varchar(20卡塔尔国–先导和得了的记录号,@obj_id int
–对象id,@temp nvarchar(300State of Qatar –有的时候语句,@strparam nvarchar(100卡塔尔国–有时参数

declare @strfd nvarchar(二〇〇四卡塔尔(قطر‎–复合主键列表,@strjoin
nvarchar(4000State of Qatar–连接字段,@strwhere
nvarchar(2003卡塔尔–查询条件–检查输入参数set
@querystr=ltrim(rtrim(@querystr卡塔尔卡塔尔select
@obj_id=object_id(@querystr),@fdshow=case isnull(@fdshow,”) when ”
then ‘ *’ else ‘ ‘+@fdshow end,@fdorder=case isnull(@fdorder,”) when
” then ” else ‘ order by

‘+@fdorder end,@querystr=case when @obj_id is not null then ‘
‘+@querystr else ‘

(‘+@querystr+’卡塔尔 a’ end–输出总记录数set @temp= ‘select
@rscount=count(*) from ‘ + @querystr+’ ‘+@wherestrset @strparam =
n’@rscount int out’execute sp_executesql @temp,@strparam,@rscount
out–要是展现第一页,能够向来用top来成功if @pagecurrent=1beginselect
@id1=cast(@pagesize as varchar(20卡塔尔国State of Qatarexec(‘select top ‘+@id1+@fdshow+’
from
‘+@querystr+@wherestr+@fdorder卡塔尔returnend–假设是表,则检查表中是不是有标志更或主键if
@obj_id is not null and objectproperty(@obj_id,’istable’)=1beginselect
@id1=cast(@pagesize as
varchar(20)),@id2=cast((@pagecurrent-1)*@pagesize as varchar(20))select
@fdname=name from syscolumns where id=@obj_id and status=0x80if
@@rowcount=0–假设表中无标识列,则检查表中是或不是有主键beginif not
exists(select 1 from sysobjects where parent_obj=@obj_id and

xtype=’pk’卡塔尔goto lbusetemp–借使表中无主键,则用不常表管理select
@fdname=name from syscolumns where id=@obj_id and colid in(select colid
from sysindexkeys where @obj_id=id and indid in(select indid from
sysindexes where @obj_id=id and name in(select name from sysobjects
where xtype=’pk’ and parent_obj=@obj_id)))

if @@rowcount1–检查表中的主键是还是不是为复合主键beginselect
@strfd=”,@strjoin=”,@strwhere=”select
@strfd=@strfd+’,[‘+name+’]’,@strjoin=@strjoin+’ and
a.[‘+name+’]=b.[‘+name+’]’,@strwhere=@strwhere+’ and b.[‘+name+’]
is null’from syscolumns where id=@obj_id and colid in(select colid from
sysindexkeys where @obj_id=id and indid in(select indid from sysindexes
where @obj_id=id and name in(select name from sysobjects where
xtype=’pk’ and parent_obj=@obj_id)))select
@strfd=substring(@strfd,2,2000),@strjoin=substring(@strjoin,5,4000),@strwhere=substring(@strwhere,5,4000)goto
lbusepkendendendelsegoto
lbusetemp/*–使用标识列或主键为单一字段的管理方式–*/lbuseidentity: if
len(@wherestr)10beginexec(‘select top ‘+@id1+@fdshow+’ from
‘+@querystr+@wherestr+’ and ‘+@fdname+’ not in(select top ‘+@id2+’
‘+@fdname+’ from
‘+@querystr+@wherestr+@fdorder+’)’+@fdorder)returnendelsebeginexec(‘select
top ‘+@id1+@fdshow+’ from ‘+@querystr+’ where ‘+@fdname+’ not in(select
top ‘+@id2+’ ‘+@fdname+’ from
‘+@querystr+@fdorder+’)’+@fdorder)returnend/*–表中有复合主键的拍卖措施–*/lbusepk:exec(‘select
‘+@fdshow+’ from(select top ‘+@id1+’ a.* from(select top 100 percent *
from ‘+@querystr+@fdorder+’) aleft join (select top ‘+@id2+’ ‘+@strfd+’
from ‘+@querystr+@fdorder+’) b on ‘+@strjoin+’where ‘+@strwhere+’)
a’)return/*–用不时表管理的法子–*/lbusetemp:select
@fdname='[id_’+cast(newid() as
varchar(40))+’]’,@id1=cast(@pagesize*(@pagecurrent-1) as
varchar(20)),@id2=cast(@pagesize*@pagecurrent-1 as
varchar(20))exec(‘select ‘+@fdname+’=identity(int,0,1),’+@fdshow+’into
#tb from’+@querystr+@fdorder+’select ‘+@fdshow+’ from #tb where
‘+@fdname+’ between ‘+@id1+’ and ‘+@id2)

网站地图xml地图