在SqlServer中用自定义函数返回动态表内容

　说明：在SupplyPlan表中，存储着每一个RequestQty及其对应的开始终止日期段；因为我在以后处理中要判断当前天属于哪一条RequestQty的日期区间并进行处理，所以后台数据库只能设计成这种存储形式；但是在页面的显示时候，需要动态的根据每一个SupplyPlanNo生成对应的多条日期区段及其数量显示，所以采用自定义函数形式返回处理以后的动态记录集！返回的字段@AllRequestQty为"1|13|5|8"形式，在asp中就可以采用split函数分组从而动态显示字段。

/*
** add by wls For: convert many lines of SP datas to one char group by vehicle,part
*/
CREATE FUNCTION xzc.fn_getContent_SupplyPlan
 (@s_p_no   int = NULL,
  @viewFlag varchar(1) = ''
 )
RETURNS @fn_getContent_SupplyPlan TABLE
 (
  ID    varchar(8000),
  SupplyPlanNo   int,
  Vehicle     varchar(25),
     Sort         varchar(20),
     Part         varchar(25),
     RequestQty   varchar(8000),
     Remark   varchar(255)
 )
AS
  BEGIN
 
   DECLARE @sVehicle  varchar(25), @sSort  varchar(20)
   DECLARE @sPart  varchar(25), @iVehicle  varchar(25)
   DECLARE @iPart  varchar(25), @sRemark varchar(255)
   
   DECLARE @RequestQty  int    , @theID int
   DECLARE @AllRequestQty varchar(8000), @allID varchar(8000)
   
   select @AllRequestQty = ''
   select @allID         = ''
   
   /*Outer CURSOR*/
   DECLARE getVehiclePartSP CURSOR SCROLL FOR
  select distinct Vehicle, Sort, Part from SupplyPlan
     where SupplyPlanNo = @s_p_no and ViewFlag = @viewFlag

/*      --Order by ID desc
  select Vehicle, Sort, Part from (select min(ID) as ID, Vehicle, Sort, Part from SupplyPlan
     where SupplyPlanNo = @s_p_no group by Vehicle, Sort, Part) a order by a.ID desc
*/
   
   /*Inner CURSOR*/
   DECLARE getContentSP CURSOR SCROLL FOR
    select ID, Vehicle, Part, RequestQty
    from SupplyPlan where SupplyPlanNo = @s_p_no and ViewFlag = @viewFlag order by ID
   
    if @s_p_no IS NULL or @s_p_no = ''
    begin
   RETURN
  end
 
   OPEN getVehiclePartSP
   
    FETCH first from getVehiclePartSP into @sVehicle,@sSort,@sPart
    while(@@fetch_status = 0)
      BEGIN
      OPEN getContentSP
       FETCH first from getContentSP into @theID, @iVehicle, @iPart, @RequestQty
       while(@@fetch_status = 0)
        BEGIN
         if @iVehicle = @sVehicle and @iPart = @sPart
         begin
          select @allID         = @allID + '|' + convert(varchar(15), @theID)
          select @AllRequestQty = @AllRequestQty + '|' + convert(varchar(25), @RequestQty)
         end
         FETCH next from getContentSP into @theID, @iVehicle, @iPart, @RequestQty
        END
      CLOSE getContentSP
      
    select @allID     = xzc.trim_char(@allID, '|')
      select @AllRequestQty = xzc.trim_char(@AllRequestQty, '|')
      select @sRemark       = (select top 1 Remark from SupplyPlan where SupplyPlanNo = @s_p_no
         and Vehicle = @sVehicle and Part = @sPart)
      
      INSERT INTO @fn_getContent_SupplyPlan VALUES(@allID, @s_p_no, @sVehicle, @sSort, @sPart, @AllRequestQty, @sRemark)

      select @AllRequestQty = ''
      select @allID         = ''
      select @sRemark       = ''
      
      FETCH next from getVehiclePartSP into @sVehicle,@sSort,@sPart
     END
      DEALLOCATE getContentSP
    
   CLOSE getVehiclePartSP
   DEALLOCATE getVehiclePartSP
 
 
  RETURN
  END

原文转自：http://www.ltesting.net