支持多表分页查询的存储过程

时间:2021-07-27 14:04:00

没有输出记录总数的:

CREATE PROCEDURE usp_PagingLarge

@TableNames VARCHAR(200), --表名,可以是多个表,但不能用别名

@PrimaryKey VARCHAR(100), --主键,可以为空,但@Order为空时该值不能为空

@Fields VARCHAR(200), --要取出的字段,可以是多个表的字段,可以为空,为空表示select *

@PageSize INT, --每页记录数

@CurrentPage INT, --当前页,0表示第1页

@Filter VARCHAR(200) = '', --条件,可以为空,不用填 where

@Group VARCHAR(200) = '', --分组依据,可以为空,不用填 group by

@Order VARCHAR(200) = '' --排序,可以为空,为空默认按主键升序排列,不用填 order by

AS

BEGIN

DECLARE @SortColumn VARCHAR(200)

DECLARE @Operator CHAR(2)

DECLARE @SortTable VARCHAR(200)

DECLARE @SortName VARCHAR(200)

IF @Fields = ''

SET @Fields = '*'

IF @Filter = ''

SET @Filter = 'WHERE 1=1'

ELSE

SET @Filter = 'WHERE ' + @Filter

IF @Group <>''

SET @Group = 'GROUP BY ' + @Group

IF @Order <> ''

BEGIN

DECLARE @pos1 INT, @pos2 INT

SET @Order = REPLACE(REPLACE(@Order, ' asc', ' ASC'), ' desc', ' DESC')

IF CHARINDEX(' DESC', @Order) > 0

IF CHARINDEX(' ASC', @Order) > 0

BEGIN

IF CHARINDEX(' DESC', @Order) < CHARINDEX(' ASC', @Order)

SET @Operator = '<='

ELSE

SET @Operator = '>='

END

ELSE

SET @Operator = '<='

ELSE

SET @Operator = '>='

SET @SortColumn = REPLACE(REPLACE(REPLACE(@Order, ' ASC', ''), ' DESC', ''), ' ', '')

SET @pos1 = CHARINDEX(',', @SortColumn)

IF @pos1 > 0

SET @SortColumn = SUBSTRING(@SortColumn, 1, @pos1-1)

SET @pos2 = CHARINDEX('.', @SortColumn)

IF @pos2 > 0

BEGIN

SET @SortTable = SUBSTRING(@SortColumn, 1, @pos2-1)

IF @pos1 > 0

SET @SortName = SUBSTRING(@SortColumn, @pos2+1, @pos1-@pos2-1)

ELSE

SET @SortName = SUBSTRING(@SortColumn, @pos2+1, LEN(@SortColumn)-@pos2)

END

ELSE

BEGIN

SET @SortTable = @TableNames

SET @SortName = @SortColumn

END

END

ELSE

BEGIN

SET @SortColumn = @PrimaryKey

SET @SortTable = @TableNames

SET @SortName = @SortColumn

SET @Order = @SortColumn

SET @Operator = '>='

END

DECLARE @type varchar(50)

DECLARE @prec int

SELECT @type=t.name, @prec=c.prec

FROM sysobjects o

JOIN syscolumns c on o.id=c.id

JOIN systypes t on c.xusertype=t.xusertype

WHERE o.name = @SortTable AND c.name = @SortName

IF CHARINDEX('char', @type) > 0

SET @type = @type + '(' + CAST(@prec AS varchar) + ')'

DECLARE @TopRows INT

SET @TopRows = @PageSize * @CurrentPage + 1

print @TopRows

print @Operator

EXEC('

DECLARE @SortColumnBegin ' + @type + '

SET ROWCOUNT ' + @TopRows + '

SELECT @SortColumnBegin=' + @SortColumn + ' FROM ' + @TableNames + ' ' + @Filter + ' ' + @Group + ' ORDER BY ' + @Order + '

SET ROWCOUNT ' + @PageSize + '

SELECT ' + @Fields + ' FROM ' + @TableNames + ' ' + @Filter + ' AND' + @SortColumn + '' + @Operator + '@SortColumnBegin ' + @Group + 'ORDER BY ' + @Order + '

')

END

GO

--调用例子:

--1.单表/单排序

EXEC usp_PagingLarge 'bigtable','d_id','d_id,d_title,d_content,d_time',20,1,'','','d_id desc'

--2.单表/多排序

EXEC usp_PagingLarge 'bigtable','d_id','*',20,0,'','','d_time asc,d_id desc'

--3.多表/单排序

EXEC usp_PagingLarge 'bigtable left join bigtable_author onbigtable.d_id=bigtable_author.BigTable_id', 'bigtable.d_id','bigtable.d_id,bigtable.d_title,bigtable.d_content,bigtable.d_time,bigtable_author.d_author',20, 0, '', '', 'bigtable.d_id asc'

--4.多表/多排序

EXEC usp_PagingLarge 'bigtable left join bigtable_author onbigtable.d_id=bigtable_author.BigTable_id', 'bigtable.d_id','bigtable.d_id,bigtable.d_title,bigtable.d_content,bigtable.d_time,bigtable_author.d_author',20, 0, '', '', 'bigtable.d_time asc,bigtable.d_id desc'

 

带输出总数的:

 

Create PROCEDURE [dbo].[proc_ListPage]
(
@tblName     nvarchar(200),        ----要显示的表或多个表的连接
@fldName     nvarchar(500) = '*',    ----要显示的字段列表
@pageSize    int = 1,        ----每页显示的记录个数
@page        int = 10,        ----要显示那一页的记录
@pageCount    int = 1 output,            ----查询结果分页后的总页数
@Counts    int = 1 output,                ----查询到的记录数
@fldSort    nvarchar(200) = null,    ----排序字段列表或条件
@Sort        bit =1,        ----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 ')
@strCondition    nvarchar(1000) = null,    ----查询条件,不需where
@ID        nvarchar(150),        ----主表的主键
@Dist                 bit = 0           ----是否添加查询字段的 DISTINCT 默认0不添加/1添加
)
AS
SET NOCOUNT ON
Declare @sqlTmp nvarchar(1000)        ----存放动态生成的SQL语句
Declare @strTmp nvarchar(1000)        ----存放取得查询结果总数的查询语句
Declare @strID     nvarchar(1000)        ----存放取得查询开头或结尾ID的查询语句

Declare @strSortType nvarchar(10)    ----数据排序规则A
Declare @strFSortType nvarchar(10)    ----数据排序规则B

Declare @SqlSelect nvarchar(50)         ----对含有DISTINCT的查询进行SQL构造
Declare @SqlCounts nvarchar(50)          ----对含有DISTINCT的总数查询进行SQL构造


if @Dist  = 0
begin
    set @SqlSelect = 'select '
    set @SqlCounts = 'Count(*)'
end
else
begin
    set @SqlSelect = 'select distinct '
    set @SqlCounts = 'Count(DISTINCT '+@ID+')'
end


if @Sort=0
begin
    set @strFSortType=' ASC '
    set @strSortType=' DESC '
end
else
begin
    set @strFSortType=' DESC '
    set @strSortType=' ASC '
end



--------生成查询语句--------
--此处@strTmp为取得查询结果数量的语句
if @strCondition is null or @strCondition=''     --没有设置显示条件
begin
    set @sqlTmp =  @fldName + ' From ' + @tblName
    set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName
    set @strID = ' From ' + @tblName
end
else
begin
    set @sqlTmp = + @fldName + 'From ' + @tblName + ' where (1>0) ' + @strCondition
    set @strTmp = @SqlSelect+' @Counts='+@SqlCounts+' FROM '+@tblName + ' where (1>0) ' + @strCondition
    set @strID = ' From ' + @tblName + ' where (1>0) ' + @strCondition
end

----取得查询结果总数量-----
exec sp_executesql @strTmp,N'@Counts int out ',@Counts out
declare @tmpCounts int
if @Counts = 0
    set @tmpCounts = 1
else
    set @tmpCounts = @Counts

    --取得分页总数
    set @pageCount=(@tmpCounts+@pageSize-1)/@pageSize

    /**//**当前页大于总页数 取最后一页**/
    if @page>@pageCount
        set @page=@pageCount

    --/*-----数据分页2分处理-------*/
    declare @pageIndex int --总数/页大小
    declare @lastcount int --总数%页大小

    set @pageIndex = @tmpCounts/@pageSize
    set @lastcount = @tmpCounts%@pageSize
    if @lastcount > 0
        set @pageIndex = @pageIndex + 1
    else
        set @lastcount = @pagesize

    --//***显示分页
    if @strCondition is null or @strCondition=''     --没有设置显示条件
    begin
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
            begin
                set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName
                        +' where '+@ID+' not in('+ @SqlSelect+' top '+CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
                        +' order by '+ @fldSort +' '+ @strFSortType+')'
                        +' order by '+ @fldSort +' '+ @strFSortType
            end
        else
            begin
            set @page = @pageIndex-@page+1 --后半部分数据处理
                if @page <= 1 --最后一页数据显示
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top'+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName
                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
                else                
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top'+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName
                        +' where '+@ID+' not in('+ @SqlSelect+' top '+CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from'+@tblName
                        +' order by '+ @fldSort +' '+ @strSortType+')'

                        +' order by '+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
            end
    end

    else --有查询条件
    begin
        if @pageIndex<2 or @page<=@pageIndex / 2 + @pageIndex % 2   --前半部分数据处理
        begin
                set @strTmp=@SqlSelect+' top '+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName +' from  '+@tblName
                    +' where '+@ID+' not in('+ @SqlSelect+' top '+CAST(@pageSize*(@page-1) as Varchar(20)) +' '+ @ID +' from '+@tblName
                    +' Where (1>0) ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType+')'
                    +' ' + @strCondition + ' order by '+ @fldSort +' '+ @strFSortType                
        end
        else
        begin
            set @page = @pageIndex-@page+1 --后半部分数据处理
            if @page <= 1 --最后一页数据显示
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top'+ CAST(@lastcount as VARCHAR(4))+' '+ @fldName+' from '+@tblName
                        +' where (1>0) '+ @strCondition +' order by'+ @fldSort +' '+ @strSortType+') AS TempTB'+' order by '+ @fldSort +''+ @strFSortType
            else
                    set @strTmp=@SqlSelect+' * from ('+@SqlSelect+' top'+ CAST(@pageSize as VARCHAR(4))+' '+ @fldName+' from '+@tblName
                        +' where '+@ID+' not in('+ @SqlSelect+' top '+CAST(@pageSize*(@page-2)+@lastcount as Varchar(20)) +' '+ @ID +' from'+@tblName
                        +' where (1>0) '+ @strCondition +' order by '+ @fldSort +' '+ @strSortType+')'
                        + @strCondition +' order by '+ @fldSort +' '+@strSortType+') AS TempTB'+' order by '+ @fldSort +' '+ @strFSortType
        end    
    end

------返回查询结果-----
exec sp_executesql @strTmp
--print @strTmp
SET NOCOUNT OFF
  调用方法举例: use northwind
Declare @Count int
EXEC proc_ListPage 'orders left join [Order Details] on[orders].orderID=[Order Details].OrderID','*',20,2,1,@Countoutput,'[orders].orderID',1,'','[orders].orderID',1
select @Count output