----＠呵呵：比的就是速度，看不懂的都是经典＠----
-------最近小弟写了几个存储过程，望各位有兴趣可测试一下（最好插入大量数据，测试一下速度)------
-------有错之处，还望各位高手加以指正！ 小弟在此深表感谢！
-------说实话：我都看不懂牛人写的嵌套子查询函数，牛人就是牛人嘛，小弟会努力的..........-------
-------在动手的同时：向牛人学习！向速度学习！向小F、小梁、Tony、Josy等牛人学习
-------最近确实跟他们学到了不少知识，在此再谢谢！
-------但有一点：大部分人认为游标比SQL语句要慢，那就快快动手吧........，实践是检验真理的唯一标准！------
-------原帖网址：
http://topic.csdn.net/u/20091009/09/1f801515-d0c7-4cef-901c-943cfb332baf.html
-------------------------------------------------------
----- 进出仓结存----修正版(函数版) ------------
----------Author：Luoyoumou----------------------------
-------------------------------------------------------
alter function inout_func(@fromdate datetime, @todate datetime)
/*
select * from dbo.inout_func( '2009-08-01','2009-08-31' )
select * from dbo.inout_func( '2009-08-01','2009-09-30' )
*/
returns
@t table([billid] int,[bd] varchar(10),[bc] varchar(10),[storeid] varchar(4),[goodsid] varchar(5),[qty] int)
as
begin
DECLARE @t2 table (
id int identity(1,1), --自增标识位
billid varchar(4),
bd varchar(10),
bc varchar(10),
storeid varchar(4),
goodsid varchar(5),
qty int,
sum_out int --指定时间段的出库总数量
);
insert into @t2(billid, bd, bc, storeid, goodsid, qty, sum_out)
select i.billid, i.bd, i.bc, i.storeid, i.goodsid, i.qty,
isnull(o.sum_out,0) sum_out
from instored i left join (
select storeid, goodsid, sum(qty) as sum_out
from outstored
where bd >=@fromdate and bd<=@todate
group by storeid, goodsid ) o
on i.storeid=o.storeid and i.goodsid=o.goodsid
where i.bd >=@fromdate and i.bd<=@todate
order by i.storeid, i.goodsid, i.bd;
--特定仓库，特定货品无出库记录的指定时间段内的入库记录直接插入
insert into @t(billid, bd, bc, storeid, goodsid, qty)
select billid, bd, bc, storeid, goodsid, qty
from @t2 where sum_out=0;
-----------定义变量-------------------------
declare @billid varchar(4)
declare @bd varchar(10)
declare @bc varchar(10)
declare @storeid varchar(4), @storeid2 varchar(4)
declare @goodsid varchar(5), @goodsid2 varchar(4)
declare @qty int, @in_sumQty int, @sum_out int
declare @flag int
set @storeid2=''
set @goodsid2=''
--游标检索
DECLARE @MyData CURSOR
SET @MyData = CURSOR FOR
SELECT billid, bd, bc, storeid, goodsid, qty, sum_out from @t2
where sum_out<>0 order by Id
OPEN @MyData
FETCH NEXT FROM @MyData INTO @billid, @bd, @bc, @storeid, @goodsid, @qty, @sum_out
WHILE @@FETCH_STATUS = 0
BEGIN
IF(@storeid2<>@storeid or @goodsid2<>@goodsid) --如果仓库编码或物料编码发生变化(没有细分是哪种情况了)
BEGIN
SET @storeid2=@storeid --重新初始化仓库编码变量
SET @goodsid2=@goodsid --重新初始化物料编码变量
SET @in_sumQty=0; --重新初始化进库存总数变量
SET @flag=0; --重新初始化标志位
END
SET @in_sumQty=@in_sumQty+@qty;
IF(@in_sumQty>@sum_out)
BEGIN
IF(@flag=0)
BEGIN ----表示第一次查找到符合条件的将要拆分的记录行
INSERT INTO @t(billid, bd, bc, storeid, goodsid, qty)
VALUES(@billid, @bd, @bc, @storeid, @goodsid, @in_sumQty-@sum_out);
SET @flag=1;
END
ELSE -----表示第二次或以上查找到符合条件的记录行(整条记录行都当作剩余的库存)
BEGIN
INSERT INTO @t(billid, bd, bc, storeid, goodsid, qty)
VALUES(@billid, @bd, @bc, @storeid, @goodsid, @qty);
END
END
FETCH NEXT FROM @MyData INTO @billid, @bd, @bc, @storeid, @goodsid, @qty, @sum_out
END
CLOSE @MyData
DEALLOCATE @MyData
return
end
-->创建表值函数
create function f_fifo(@start varchar(10),@end varchar(10))
returns
@t table([billid] int,[bd] varchar(10),[bc] varchar(9),[storeid] varchar(3),[goodsid] varchar(4),[qty] int)
as
begin
insert @t
select
billid,convert(varchar(10),bd,120),bc,storeid,goodsid,
case when iqty>qty then qty else iqty end as qty
from(
select
a.billid,a.bd,a.bc,a.storeid,a.goodsid,a.qty as iqty,
(select sum(qty)
from (select
*,
px=(select count(1)
from instored
where storeid=i.storeid and goodsid=i.goodsid and (bd<i.bd or bd=i.bd and billid<i.billid) and convert(varchar(10),bd,120) between @start and @end)
from instored i where convert(varchar(10),bd,120) between @start and @end)t
where storeid=a.storeid and goodsid=a.goodsid and px<=a.px
)-isnull(b.qty,0) as qty
from
(select
*,
px=(select count(1)
from instored
where storeid=i.storeid and goodsid=i.goodsid and (bd<i.bd or bd=i.bd and billid<i.billid) and convert(varchar(10),bd,120) between @start and @end)
from instored i where convert(varchar(10),bd,120) between @start and @end) a
left join
(select storeid,goodsid,sum(qty) as qty from [outstored] where convert(varchar(10),bd,120) between @start and @end group by storeid,goodsid) b
on
a.storeid=b.storeid and a.goodsid=b.goodsid
) tt
where qty>0
order by
storeid,goodsid
return
end
go
-->查询1
SELECT * FROM dbo.f_fifo('2009-08-01','2009-08-31')
/**
billid bd bc storeid goodsid qty
----------- ---------- --------- ------- ------- -----------
9 2009-08-20 090820002 a仓 g001 200
3 2009-08-23 090823001 b仓 g001 600
5 2009-08-23 090823003 b仓 k002 1900
(3 行受影响)
**/
-->查询2
SELECT * FROM dbo.f_fifo('2009-08-01','2009-09-30')
/**
billid bd bc storeid goodsid qty
----------- ---------- --------- ------- ------- -----------
6 2009-09-26 090926001 a仓 g001 200
3 2009-08-23 090823001 b仓 g001 600
5 2009-08-23 090823003 b仓 k002 900
7 2009-09-27 090927001 b仓 k002 400
------验证数据代码：
/*
select sum(qty) from (SELECT * FROM dbo.f_fifo('2009-09-01','2009-09-30')) t
select (select sum(qty) from Instored where bd<'2009-08-01')-(select sum(qty) from Outstored where bd<'2009-08-01')
exec inout_proc '2009-08-01','2009-08-31'
exec inout_proc '2009-08-01','2009-09-30'
select top 1 * from instored;
select (select sum(qty) from Instored where bd>='2009-08-01' and bd<='2009-09-30')-(select sum(qty) from Outstored where bd>='2009-08-01' and bd<='2009-09-30')
*/
/*
select sum(qty) from (select * from dbo.inout_func( '2009-08-01','2009-09-30' )) t
select * from dbo.inout_func( '2009-08-01','2009-09-30' )
*/
