＠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

SQL code

--
-----------------------------------------------------

--
---       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

------------------------牛人搞定的：嵌套子查询函数----------------------------------------------------

SQL code

--
>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

-------------------------还有：数据多了，两者的结果并非完全一样------------------------

SQL code

--
----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' )

*/