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高效率分页sql存储过程

热度:73   发布时间:2016-05-05 14:53:40.0
高效分页sql存储过程
我这里有一个存储过程,很长很长啊。--别看他很长,但是效率很高。5000万条数据亲测。--不知道你用什么变成语言。这里就不不写调用方法了。CREATE proc newgetpage(--默认分页主键为id @tblName  nvarchar(128),  --表名称列表 @PageSize  int=10,   --页尺寸 @PageIndex   int=1,   --当前页 @fields   nvarchar(4000)='*', --查询字段列表 @fldname  nvarchar(50),  --主键字段名 @fldorder  bit=1,   --主键排序方式,0asc,非零desc @FirstfldName  nvarchar(50)='',              --主排序字段名,非主键,有重复值 @FirstfldOrder  bit=1,   --主字段排序方式 @SecondfldName nvarchar(50)='',              --副排序字段名,非主键,有重复值 @SecondfldOrder bit=1,   --副字段排序方式 @strWhere  nvarchar(1000)='', --查询条件 @Iscount  bit=0   --返回记录总数,非0则返回)asdeclare @strsql   nvarchar(4000)  --主语句declare @strtmp   nvarchar(500)  --临时变量declare @strorder   nvarchar(500)  --总排序方式declare @stropporder   nvarchar(500)  --总排序的反方式declare @strorderfldlist  nvarchar(500)  --所有要排序的字段序列declare @selectfld  nvarchar(500)  --选择主键pagedeclare @selectfirst  nvarchar(500)  --选择主排序pagedeclare @selectsecond  nvarchar(500)  --选择副排序page/**/declare @strwheretmp  nvarchar(500)  --临时where变量if @strwhere!='' set @strwheretmp=' where 'else set @strwheretmp=''/**/set @strsql=''set @strtmp=''set @strorder=''set @stropporder=''set @strorderfldlist=''set @selectfld=''set @selectfirst=''set @selectsecond=''if @pagesize<1 set @pagesize=10if @pageindex<1 set @pageindex=1if @fields='' set @fields='*'if @FirstfldName='' set @FirstfldName=''if @SecondfldName='' set @SecondfldName=''--------------------------------bengin----------总排序方式if @fldorder!=0 begin  -----正排序  set @[email protected] + ' desc '  if @secondfldname!=''   if @secondfldorder!=0    set @[email protected] + ' desc,[email protected]   else    set @[email protected] + ' asc,[email protected]  if @firstfldname!=''   if @firstfldorder!=0    set @[email protected] + ' desc,[email protected]   else    set @[email protected] + ' asc,[email protected]  -----反排序  set @[email protected] + ' asc '  if @secondfldname!=''   if @secondfldorder!=0    set @[email protected] + ' asc,[email protected]   else    set @[email protected] + ' desc,[email protected]  if @firstfldname!=''   if @firstfldorder!=0    set @[email protected] + ' asc,[email protected]   else    set @[email protected] + ' desc,[email protected] endelse begin  -----正排序  set @[email protected] + ' asc '  if @secondfldname!=''   if @secondfldorder!=0    set @[email protected] + ' desc,[email protected]   else    set @[email protected] + ' asc,[email protected]  if @firstfldname!=''   if @firstfldorder!=0    set @[email protected] + ' desc,[email protected]   else    set @[email protected] + ' asc,[email protected]  -----反排序  set @[email protected] + ' desc '  if @secondfldname!=''   if @secondfldorder!=0    set @[email protected] + ' desc,[email protected]   else    set @[email protected] + ' asc,[email protected]  if @firstfldname!=''   if @firstfldorder!=0    set @[email protected] + ' desc,[email protected]   else    set @[email protected] + ' asc,[email protected] endset @stropporder=' order by [email protected]set @strorder=' order by [email protected] +' '---------总排序方式end---------总排序字段序列set @strorderfldlist='id'if @firstfldname!='' begin set @[email protected]+',[email protected] if @secondfldname!=''  set @[email protected]+',[email protected] end---------总排序字段序列endif @Firstfldname!=''-------若主排序字段不空,则按主排序字段排序, begin    if @fldorder!=0          set @strTmp = '<=(select top 1'  else       set @strTmp = '>=(select top 1'  set @[email protected] + replace(@strtmp,'=','')+'([email protected]+')from(select top ' + str((@PageIndex-1)[email protected])    + ' [email protected] +' from  [email protected]+' [email protected][email protected] [email protected]   +')as tbltmp '+ @stropporder +')'  if @firstfldname!=''   set @selectfirst=' and [email protected] + @strtmp+'([email protected]+')from(select top ' + str((@PageIndex-1)[email protected])     + ' [email protected] +' from  [email protected]+' [email protected][email protected] [email protected]    +')as tbltmp '+ @stropporder +')'  if @secondfldname!=''   set @selectsecond=' and [email protected] + @strtmp+'([email protected]+')from(select top ' + str((@PageIndex-1)[email protected])     + ' [email protected] +' from  [email protected]+' [email protected][email protected] [email protected]    +')as tbltmp '+ @stropporder +')'  ------------多字段排序代码  set @strSQL = 'select top ' + str(@PageSize) + ' [email protected]+' from '      + @tblName + ' where ' + @selectfld + @selectfirst+ @selectsecond+ @strOrder    if @strWhere != ''      set @strSQL = 'select top ' + str(@PageSize) + ' [email protected]+' from '          + @tblName + ' where ' + @selectfld + @selectfirst+ @selectsecond+' and ' + @strWhere + ' ' + @strOrder  ------------多字段排序代码end end-------若主排序字段不空,则按主排序字段排序,endelse-------若主排序字段为空,则按主键排序, begin  if charindex('.',@fldname)>0   set @selectfld=substring(@fldname,charindex('.',@fldname)+1,len(@fldname))  else   set @[email protected]  if @fldorder!=0      begin       set @strTmp = '<(select top 1'       set @strOrder = ' order by ' + @fldName +' desc'       set @stropporder=' order by [email protected] +' asc'   end  else   begin       set @strTmp = '>(select top 1'       set @strOrder = ' order by ' + @fldName +' asc'       set @stropporder=' order by [email protected] +' desc '   end     set @strSQL = 'select top ' + str(@PageSize) + ' [email protected]+' from '   + @tblName + ' where ' + @fldName + '' + @strTmp + '('   + @selectfld + ') from (select top ' + str((@PageIndex-1)[email protected]) + ' '   + @fldName + ' from ' + @tblName + '' + @strOrder + ') as tblTmp [email protected] +')'   + @strOrder     if @strWhere != ''   set @strSQL = 'select top ' + str(@PageSize) + ' [email protected]+' from '           + @tblName + ' where ' + @fldName + '' + @strTmp + '('           + @selectfld + ') from (select top ' + str((@PageIndex-1)[email protected]) + ' '           + @fldName + ' from ' + @tblName + ' where ' + @strWhere + ' '           + @strOrder + ') as tblTmp [email protected] +') and ' + @strWhere + ' ' + @strOrder end-------若主排序字段为空,则按主键排序,endif @PageIndex = 1begin    set @strTmp = ''    if @strWhere != ''        set @strTmp = ' where ' + @strWhere    set @strSQL = 'select top ' + str(@PageSize) + ' [email protected]+' from '        + @tblName + '' + @strTmp + ' ' + @strOrderendif @IsCount != 0begin    set @strSQL = 'select count(*) as Total from ' + @tblName + ''if @strWhere!=''    set @strSQL='select count(*) as Total from [email protected] +' where ' [email protected]end--print @strsqlexec (@strSQL)GO 
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