实现上千万条数据的分页显示_数据库技巧

— 获取指定页的数据
CREATE PROCEDURE GetRecordFromPage
    @tblName      varchar(255),       — 表名
    @fldName      varchar(255),       — 字段名
    @PageSize     int = 10,           — 页尺寸
    @PageIndex    int = 1,            — 页码
    @IsCount      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(1000) =   — 查询条件 (注意: 不要加 where)
AS

declare @strSQL   varchar(6000)       — 主语句
declare @strTmp   varchar(100)        — 临时变量
declare @strOrder varchar(400)        — 排序类型

if @OrderType != 0
begin
    set @strTmp = “<(select min”
    set @strOrder = ” order by [” + @fldName +”] desc”
end
else
begin
    set @strTmp = “>(select max”
    set @strOrder = ” order by [” + @fldName +”] asc”
end

set @strSQL = “select top ” + str(@PageSize) + ” * 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) + ” * from [“
        + @tblName + “] where [” + @fldName + “]” + @strTmp + “([“
        + @fldName + “]) from (select top ” + str((@PageIndex-1)*@PageSize) + ” [“
        + @fldName + “] from [” + @tblName + “] where ” + @strWhere + ” “
        + @strOrder + “) as tblTmp) and ” + @strWhere + ” ” + @strOrder

if @PageIndex = 1
begin
    set @strTmp = “”
    if @strWhere !=
        set @strTmp = ” where ” + @strWhere

    set @strSQL = “select top ” + str(@PageSize) + ” * from [“
        + @tblName + “]” + @strTmp + ” ” + @strOrder
end

if @IsCount != 0
    set @strSQL = “select count(*) as Total from [” + @tblName + “]”

exec (@strSQL)

GO