通用高效分页存储过程代码

-- 获取指定页的数据
create procedure pagination
@tblname varchar(255), -- 表名
@strgetfields varchar(1000) = '*', -- 需要返回的列
@fldname varchar(255)='', -- 排序的字段名
@pagesize int = 10, -- 页尺寸
@pageindex int = 1, -- 页码
@docount bit = 0, -- 返回记录总数, 非 0 值则返回
@ordertype bit = 0, -- 设置排序类型, 非 0 值则降序
@strwhere varchar(1500) = '' -- 查询条件 (注意: 不要加 where)
as

declare @strsql varchar(5000) -- 主语句
declare @strtmp varchar(110) -- 临时变量
declare @strorder varchar(400) -- 排序类型
if @docount != 0
begin
if @strwhere !=''
set @strsql = "select count(*) as total from [" + @tblname + "] where "[email protected]
else
set @strsql = "select count(*) as total from [" + @tblname + "]"
end
--以上代码的意思是如果@docount传递过来的不是0，就执行总数统计。以下的所有代码都是@docount为0的情况

else
begin
if @ordertype != 0
begin
set @strtmp = "<(select min"
set @strorder = " order by [" + @fldname +"] desc"
--如果@ordertype不是0，就执行降序，这句很重要！
end

else
begin
set @strtmp = ">(select max"
set @strorder = " order by [" + @fldname +"] asc"
end
if @pageindex = 1
begin
if @strwhere != ''
set @strsql = "select top " + str(@pagesize) +" "[email protected]+ " from [" + @tblname + "] where " + @strwhere + " " + @strorder
else
set @strsql = "select top " + str(@pagesize) +" "[email protected]+ " from ["+ @tblname + "] "+ @strorder
--如果是第一页就执行以上代码，这样会加快执行速度
end

else
begin
--以下代码赋予了@strsql以真正执行的sql代码
set @strsql = "select top " + str(@pagesize) +" "[email protected]+ " from ["
+ @tblname + "] where [" + @fldname + "]" + @strtmp + "(["+ @fldname + "]) from (select top " + str((@pageindex-1)*@pagesize) + " ["+ @fldname + "] from [" + @tblname + "]" + @strorder + ") as tbltmp)"+ @strorder
if @strwhere != ''
set @strsql = "select top " + str(@pagesize) +" "[email protected]+ " from ["
+ @tblname + "] where [" + @fldname + "]" + @strtmp + "(["
+ @fldname + "]) from (select top " + str((@pageindex-1)*@pagesize) + " ["
+ @fldname + "] from [" + @tblname + "] where " + @strwhere + " "
+ @strorder + ") as tbltmp) and " + @strwhere + " " + @strorder
end
end
exec (@strsql)
go