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create table 表1(货号 varchar(20),批次 int ,数量 int)
create table 表2(货号 varchar(20) ,数量 int)
/*------------------------------*/
insert into 表1
select '001', 1, 100 union all
select '001', 2, 200 union all
select '002', 2, 200 union all
select '002', 4, 200 union all
select '111', 4, 200 union all
select '001', 3, 300
/*------------------------------*/
insert into 表2
select '001', 400 union ALL
select '002', 300
/*------------------------------*/
--select * from 表1
--select * from 表2
/*------------------------------*/
select t1.货号,t1.批次,
case when ((select isnull(sum(数量),0) from 表1 t3 where t3.货号=t1.货号 and t3.批次<t1.批次)-isnull(t2.new_数量,0))<0
then case when ((select isnull(sum(数量),0) from 表1 t4 where t4.货号=t1.货号 and t4.批次<=t1.批次)-isnull(t2.new_数量,0))<0 then 0 --第一步
else ((select isnull(sum(数量),0) from 表1 t4 where t4.货号=t1.货号 and t4.批次<=t1.批次)-isnull(t2.new_数量,0))--第二步
end
else t1.数量--第三步
end as 批次剩余库存数
from 表1 t1
left join (select 货号,sum(数量) as new_数量 from 表2 group by 货号) t2
on t1.货号=t2.货号
/*------------------------------*/
create table #t1(货号 varchar(20),批次 int,数量 int)
create table #t2(货号 varchar(20),日期 datetime, 数量 int)
/*------------------------------*/
insert into #t1
select '001', 1, 100 union all
select '001', 2, 200 union all
select '002', 2, 200 union all
select '002', 4, 200 union all
select '111', 4, 200 union all
select '001', 3, 300 union all
select '003', 5, 100 union all
select '003', 6, 100 union all
select '003', 7, 100
/*------------------------------*/
insert into #t2
select '001', '2015-10-01', 200 union ALL
select '001', '2015-10-02', 200 union ALL
select '002', '2015-10-03', 300 union ALL
select '003', '2015-10-04', 100
;WITH t1 AS (
SELECT *,
ROW_NUMBER() OVER(PARTITION BY 货号 ORDER BY 批次) rn
FROM #t1
)
,t2 AS (
SELECT *,
ROW_NUMBER() OVER(PARTITION BY 货号 ORDER BY 日期) rn
FROM #t2
)
,r AS (
-- 货号的第一条
SELECT t1.货号,
t1.批次,
t2.日期,
t1.数量 AS 原数量,
CASE WHEN t1.数量 <= ISNULL(t2.数量,0) THEN
t1.数量
ELSE
t2.数量
END AS 出库数量,
t1.数量 - ISNULL(t2.数量,0) AS 剩余数量,
t1.rn AS t1_rn,
t2.rn AS t2_rn
FROM t1
LEFT JOIN t2
ON t1.货号 = t2.货号
AND t2.rn = 1
WHERE t1.rn = 1
UNION ALL -- 分配有剩余,继续下一个出库
SELECT r.货号,
r.批次,
t2.日期,
r.剩余数量 AS 原数量,
CASE WHEN r.剩余数量 <= ISNULL(t2.数量,0) THEN
r.剩余数量
ELSE
t2.数量
END AS 出库数量,
r.剩余数量 - ISNULL(t2.数量,0) AS 剩余数量,
r.t1_rn,
t2.rn AS t2_rn
FROM r
JOIN t2
ON r.货号 = t2.货号
AND t2.rn = r.t2_rn + 1
WHERE r.剩余数量 > 0
UNION ALL -- 分配不足,继续下一个批次
SELECT r.货号,
t1.批次,
r.日期,
t1.数量 AS 原数量,
CASE WHEN t1.数量 <= ABS(r.剩余数量) THEN
0
ELSE
ABS(r.剩余数量)
END AS 出库数量,
r.剩余数量 + t1.数量 AS 剩余数量,
t1.rn AS t1_rn,
r.t2_rn
FROM r
JOIN t1
ON r.货号 = t1.货号
AND t1.rn = r.t1_rn + 1
WHERE r.剩余数量 < 0
UNION ALL -- 正好分配完,两边都继续下一个
SELECT t1.货号,
t1.批次,
t2.日期,
t1.数量 AS 原数量,
CASE WHEN t1.数量 <= ISNULL(t2.数量,0) THEN
t1.数量
ELSE
t2.数量
END AS 出库数量,
t1.数量 - ISNULL(t2.数量,0) AS 剩余数量,
t1.rn AS t1_rn,
t2.rn AS t2_rn
FROM r
JOIN t1
ON r.货号 = t1.货号
AND t1.rn = r.t1_rn + 1
JOIN t2
ON r.货号 = t2.货号
AND t2.rn = r.t2_rn + 1
WHERE r.剩余数量 = 0
UNION ALL -- 还要考虑出库分完后多余的批次
SELECT r.货号,
t1.批次,
NULL AS 日期,
t1.数量 AS 原数量,
0 AS 出库数量,
t1.数量 AS 剩余数量,
t1.rn AS t1_rn,
r.t2_rn
FROM r
JOIN t1
ON r.货号 = t1.货号
AND t1.rn = r.t1_rn + 1
WHERE r.剩余数量 >= 0
AND NOT EXISTS (
SELECT *
FROM t2
WHERE r.货号 = t2.货号
AND t2.rn > r.t2_rn
)
)
SELECT 货号,批次,日期,原数量,出库数量,剩余数量
FROM r
ORDER BY 货号,
(CASE WHEN 日期 IS NULL THEN 1 ELSE 0 END),
日期
--OPTION (MAXRECURSION 1000)
货号 批次 日期 原数量 出库数量 剩余数量
---- ---- ---------- ----------- ----------- -----------
001 1 2015-10-01 100 100 -100
001 2 2015-10-01 200 100 100
001 2 2015-10-02 100 100 -100
001 3 2015-10-02 300 100 200
002 2 2015-10-03 200 200 -100
002 4 2015-10-03 200 100 100
003 5 2015-10-04 100 100 0
003 6 NULL 100 0 100
003 7 NULL 100 0 100
111 4 NULL 200 NULL 200