存储过程如下，是一个分页查询的，我想实现多表查询，网上的都使用的是
bigtable left join bigtable_author on 这种联合查询得到的表结果，我想使用 union 获得结果值，请问下面这个存储过程怎么修改呢？
小弟新手对存储过程不太了解，求大大给修改一下，万分感谢了
小弟实在是没有多少分了，谢谢大家帮忙了
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
--分页存储过程
CREATE PROCEDURE [dbo].[sp_Paging]
(
@Tables nvarchar(1000), --表名/视图名
@PrimaryKey nvarchar(100), --主键
@Sort nvarchar(200) = NULL, --排序字段(不带order by)
@pageindex int = 1, --当前页码
@PageSize int = 10, --每页记录数
@Fields nvarchar(1000) = N'*', --输出字段
@Filter nvarchar(1000) = NULL, --where过滤条件(不带where)
@Group nvarchar(1000) = NULL, --Group语句(不带Group By)
@TotalCount int OUTPUT --总记录数
)
AS
DECLARE @SortTable nvarchar(100)
DECLARE @SortName nvarchar(100)
DECLARE @strSortColumn nvarchar(200)
DECLARE @operator char(2)
DECLARE @type nvarchar(100)
DECLARE @prec int
--设定排序语句
IF @Sort IS NULL OR @Sort = ''
SET @Sort = @PrimaryKey
IF CHARINDEX('DESC',@Sort)>0
BEGIN
SET @strSortColumn = REPLACE(@Sort, 'DESC', '')
SET @operator = '<='
END
ELSE
BEGIN
SET @strSortColumn = REPLACE(@Sort, 'ASC', '')
SET @operator = '>='
END
IF CHARINDEX('.', @strSortColumn) > 0
BEGIN
SET @SortTable = SUBSTRING(@strSortColumn, 0, CHARINDEX('.',@strSortColumn))
SET @SortName = SUBSTRING(@strSortColumn, CHARINDEX('.',@strSortColumn) + 1, LEN(@strSortColumn))
END
ELSE
BEGIN
SET @SortTable = @Tables
SET @SortName = @strSortColumn
END
--设置排序字段类型和精度
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 @strPageSize nvarchar(50)
DECLARE @strStartRow nvarchar(50)
DECLARE @strFilter nvarchar(1000)
DECLARE @strSimpleFilter nvarchar(1000)
DECLARE @strGroup nvarchar(1000)
IF @pageindex <1
SET @pageindex = 1
SET @strPageSize = CAST(@PageSize AS nvarchar(50))
--设置开始分页记录数
SET @strStartRow = CAST(((@pageindex - 1)*@PageSize + 1) AS nvarchar(50))
--筛选以及分组语句
IF @Filter IS NOT NULL AND @Filter != ''
BEGIN
SET @strFilter = ' WHERE ' + @Filter + ' '
SET @strSimpleFilter = ' AND ' + @Filter + ' '
END
ELSE
BEGIN
SET @strSimpleFilter = ''
SET @strFilter = ''
END
IF @Group IS NOT NULL AND @Group != ''
SET @strGroup = ' GROUP BY '
--计算总记录数
DECLARE @TotalCountSql nvarchar(1000)
SET @TotalCountSql=N'SELECT @TotalCount=COUNT(*)' +N' FROM ' + @Tables + @strFilter
EXEC sp_executesql @TotalCountSql,N'@TotalCount int OUTPUT',@TotalCount OUTPUT
--执行查询语句
EXEC(
'
DECLARE @SortColumn ' + @type + '
SET ROWCOUNT ' + @strStartRow + '
SELECT @SortColumn=' + @strSortColumn + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '
SET ROWCOUNT ' + @strPageSize + '
SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @strSortColumn + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '
'
)
------解决思路----------------------
EXEC('DECLARE @SortColumn ' + @type + 'SET ROWCOUNT ' + @strStartRow + 'SELECT @SortColumn=' + @strSortColumn + ' FROM ' + @Tables + @strFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + 'SET ROWCOUNT ' + @strPageSize + 'SELECT ' + @Fields + ' FROM ' + @Tables + ' WHERE ' + @strSortColumn + @operator + ' @SortColumn ' + @strSimpleFilter + ' ' + @strGroup + ' ORDER BY ' + @Sort + '')
最前面的EXEC改成PRINT 贴结果来看看