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高效多表分页存储过程,可支持多表查询,任意排序

时间:2016-06-16 01:34:35      阅读:294      评论:0      收藏:0      [点我收藏+]

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废话不多说,直接上代码:

SQL存储过程:

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(4000),         --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(4000) = ‘‘,     --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
@RecordCount int OUTPUT             --总记录数,自己增加(总记录数)
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 +     
     )    
      IF @RecordCount IS NULL
BEGIN
    DECLARE @sql nvarchar(4000)
    SET @sql=NSELECT @RecordCount=COUNT(*)
        +N FROM +@TableNames
        +N +@Filter
    EXEC sp_executesql @sql,N@RecordCount int OUTPUT,@RecordCount OUTPUT
END


END

SQL调用:

declare @count int
exec usp_PagingLarge ‘表1,表2,表3‘,‘表1 主键‘,‘要添加的字段‘,10,1,‘条件,多条件时用and连接‘,‘‘,‘排序字段 desc‘,@RecordCount=@count output
select @count

 

C#调用:

List<usp_PagingLarge_Result> Me = he.usp_PagingLarge("表1,表2,表3", "表1 主键", "要添加的字段", 10, 1, "条件,多条件时用and连接", "", "排序字段 desc", count).ToList();
Console.WriteLine(count.Value);

 

高效多表分页存储过程,可支持多表查询,任意排序

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原文地址:http://www.cnblogs.com/genesis/p/5589427.html

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