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,Part from (select min(ID) as ID,Vehicle,Part from SupplyPlan
     where SupplyPlanNo = @s_p_no group by Vehicle,Part) a order by a.ID desc
*/
   /*Inner CURSOR*/
   DECLARE getContentSP CURSOR SCROLL FOR
    select ID,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,@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,@sPart,@AllRequestQty,@sRemark)

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