2分法分页存储过程脚本实例

if @Sort=0
set @strTmp = @strTmp + '<(select min('
 else
set @strTmp = @strTmp + '>(select max('

  1ALTER PROCEDURE [dbo].[proc_ListPage]
  2(
  3 @tblName     nvarchar(200),        ----要显示的表或多个表的连接
  4 @fldName     nvarchar(500) = '*',    ----要显示的字段列表
  5 @pageSize    int = 10,        ----每页显示的记录个数
  6 @page        int = 1,        ----要显示那一页的记录
  7 @fldSort    nvarchar(200) = null,    ----排序字段列表或条件
  8 @Sort        bit = 0,        ----排序方法，0为升序，1为降序(如果是多字段排列Sort指代最后一个排序字段的排列顺序(最后一个排序字段不加排序标记)--程序传参如：' SortA Asc,SortB Desc,SortC ')
  9 @strCondition    nvarchar(1000) = null,    ----查询条件,不需where
 10 @ID        nvarchar(150),        ----主表的主键
 11 @Dist      bit = 0,           ----是否添加查询字段的 DISTINCT 默认0不添加/1添加
 12 @pageCount    int = 1 output,            ----查询结果分页后的总页数
 13 @Counts    int = 1 output                ----查询到的记录数
 14 )
 15 AS
 16 SET NOCOUNT ON
 17 Declare @sqlTmp nvarchar(1000)        ----存放动态生成的SQL语句
 18 Declare @strTmp nvarchar(1000)        ----存放取得查询结果总数的查询语句
 19 Declare @strID     nvarchar(1000)        ----存放取得查询开头或结尾ID的查询语句
 20
 21 Declare @strSortType nvarchar(10)    ----数据排序规则A
 22 Declare @strFSortType nvarchar(10)    ----数据排序规则B
 23
 24 Declare @SqlSelect nvarchar(50)         ----对含有DISTINCT的查询进行SQL构造
 25 Declare @SqlCounts nvarchar(50)          ----对含有DISTINCT的总数查询进行SQL构造
 26
 27
 28 if @Dist  = 0
 29 begin
 30     set @SqlSelect = 'select '
 31     set @SqlCounts = 'Count(0)'
 32 end
 33 else
 34 begin
 35     set @SqlSelect = 'select distinct '
 36     set @SqlCounts = 'Count(DISTINCT '+@ID+')'
 37 end
 38
 39
 40 if @Sort=0
 41 begin
 42     set @strFSortType=' ASC '
 43     set @strSortType=' DESC '
 44 end
 45 else
 46 begin
 47     set @strFSortType=' DESC '
 48     set @strSortType=' ASC '
 49 end
 50
 51
 52
 53 --------生成查询语句--------
 54 --此处@strTmp为取得查询结果数量的语句
 55 if @strCondition is null or @strCOndition=''     --没有设置显示条件
 56 begin
 57     set @sqlTmp =  @fldName + ' From ' + @tblName
 58     set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName
 59     set @strID = ' From ' + @tblName
 60 end
 61 else
 62 begin
 63     set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition
 64     set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition
 65     set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition
 66 end
 67
 68 ----取得查询结果总数量-----
 69 exec sp_executesql @strTmp,N'@Counts int out ',@Counts out
 70 declare @tmpCounts int
 71 if @Counts = 0
 72     set @tmpCounts = 1
 73 else
 74     set @tmpCounts = @Counts
 75
 76     --取得分页总数
 77     set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize
 78
 79     /**//**当前页大于总页数 取最后一页**/
 80     if @page>@pageCount
 81         set @page=@pageCount
 82
 83     --/*-----数据分页2分处理-------*/
 84     declare @pageIndex int --总数/页大小
 85     declare @lastcount int --总数%页大小
 86
 87     set @pageIndex = @tmpCounts/@pageSize
 88     set @lastcount = @tmpCounts%@pageSize
 89     if @lastcount > 0
 90         set @pageIndex = @pageIndex + 1
 91     else
 92         set @lastcount = @pagesize
 93
 94 --为配合显示
 95 set nocount off
 96 select @page curpage,@pageSize pagesize,@pageCount countpage,@tmpCounts [Rowcount]
 97 set nocount on
 98
 99  --//***显示分页
100     if @strCondition is null or @strCOndition=''     --没有设置显示条件
101     begin
102         if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
103             begin
104                 if @page=1
105                     set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName                       
106                         +' order by '+ @fldSort +' '+ @strFSortType
107                 else
108                 begin                   
109                     set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
110                         +' where '+@ID
111                     if @Sort=0
112                        set @strTmp = @strTmp + '>(select max('
113                     else
114                        set @strTmp = @strTmp + '<(select min('
115                     set @strTmp = @strTmp + @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
116                         +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'
117                         +' order by '+ @fldSort +' '+ @strFSortType
118                 end   
119             end
120         else
121            
122             begin
123             set @page = @pageIndex-@page+1 --后半部分数据处理
124                 if @page <= 1 --最后一页数据显示           
125                     set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(40))+' '+ @fldName+' from '+@tblName
126                         +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
127                 else
128                     begin
129                     set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
130                         +' where '+@ID
131                         if @Sort=0
132                            set @strTmp=@strTmp+' <(select min('
133                         else
134                            set @strTmp=@strTmp+' >(select max('
135  set @strTmp=@strTmp+ @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
136                         +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'
137                         +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
138                    end
139             end
140
141     end
142
143     else --有查询条件
144     begin
145         if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
146         begin
147                 if @page=1
148                     set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName                       
149                         +' where 1=1 ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType
150                 else
151                 begin                   
152                     set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
153                         +' where '+@ID
154                     if @Sort=0
155                        set @strTmp = @strTmp + '>(select max('
156                     else
157                        set @strTmp = @strTmp + '<(select min('
158
159                  set @strTmp = @strTmp + @ID +') from ('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
160                         +' where (1=1) ' + @strCondition +' order by '+ @fldSort +' '+ @strFSortType+') AS TBMinID)'
161                         +' '+ @strCondition +' order by '+ @fldSort +' '+ @strFSortType
162                 end           
163         end
164         else
165         begin
166             set @page = @pageIndex-@page+1 --后半部分数据处理
167             if @page <= 1 --最后一页数据显示
168                     set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@lastcount as VARCHAR(40))+' '+ @fldName+' from '+@tblName
169                         +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType                    
170             else
171                   begin
172                     set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(40))+' '+ @fldName+' from '+@tblName
173                         +' where '+@ID
174                     if @Sort=0
175                        set @strTmp = @strTmp + '<(select min('
176                     else
177                        set @strTmp = @strTmp + '>(select max('
178                set @strTmp = @strTmp + @ID +') from('+ @SqlSelect+' top '+ CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from '+@tblName
179                         +' where (1=1) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+') AS TBMaxID)'
180                         +' '+ @strCondition+' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType 
181                  end             
182         end   
183  
184     end
185
186 ------返回查询结果-----
187 SET NOCOUNT off
188 exec sp_executesql @strTmp
189 print @strTmp