SQL Query根据给定条件计算剩余运行余额
我有一个像这样的股票交易表：
StockID Item TransDate TranType BatchNo Qty Price
10001 ABC 01-Apr-2012 IN 71001000 200 750.0
10002 ABC 02-Apr-2012 OUT 100
10003 ABC 03-Apr-2012 IN 71001001 50 700.0
10004 ABC 04-Apr-2012 IN 71001002 75 800.0
10005 ABC 10-Apr-2012 OUT 125
10006 XYZ 05-Apr-2012 IN 71001003 150 350.0
10007 XYZ 05-Apr-2012 OUT 120
10008 XYZ 15-Apr-2012 OUT 10
10009 XYZ 20-Apr-2012 IN 71001004 90 340.0
10010 PQR 06-Apr-2012 IN 71001005 50 510.0
10011 PQR 15-Apr-2012 IN 71001006 60 505.0
10012 MNO 01-Apr-2012 IN 71001007 76 410.0
10013 MNO 11-Apr-2012 OUT 76
我的每笔IN交易都有与之关联的价格和批号（批号）。现在我想通过先入先出（FIFO）规则计算剩余数量，这意味着第一个应该先用out进行调整。在调整数量后，剩余余额将针对同一项目的每个IN交易计算，如下所示：
StockID Item TransDate TranType BatchNo Qty Price RemainingQty
10001 ABC 01-Apr-2012 IN 71001000 200 750.0 0
10002 ABC 02-Apr-2012 OUT 100
10003 ABC 03-Apr-2012 IN 71001001 50 700.0 25
10004 ABC 04-Apr-2012 IN 71001002 75 800.0 75
10005 ABC 10-Apr-2012 OUT 125
10006 XYZ 05-Apr-2012 IN 71001003 150 350.0 20
10007 XYZ 05-Apr-2012 OUT 120
10008 XYZ 15-Apr-2012 OUT 10
10009 XYZ 20-Apr-2012 IN 71001004 90 340.0 90
10010 PQR 06-Apr-2012 IN 71001005 50 510.0 50
10011 PQR 15-Apr-2012 IN 71001006 60 505.0 60
10012 MNO 01-Apr-2012 IN 71001007 76 410.0 0
10013 MNO 11-Apr-2012 OUT 76
从上表中可以看到项目ABC，在使用FIFO调整（125 + 100）OUT数量与IN数量（100 + 50 + 75）之后，批次71001000的剩余数量为0,71001001为25对于批次71001002是75.从剩余数量可以得出该值。
请帮助我使用任何方法（基于游标或CTE或JOINS等）实现此目的 在此先感谢您的帮助。
StockOverflow的一位用户提出了这个答案：
SELECT 10001 as stockid,'ABC' as item,'01-Apr-2012' as transdate,'IN' as trantype, 71001000 as batchno, 200 as qty, 750.0 as price INTO #sample
UNION ALL SELECT 10002 ,'ABC','02-Apr-2012','OUT', NULL ,100,NULL
UNION ALL SELECT 10003 ,'ABC','03-Apr-2012','IN', 71001001, 50 , 700.0
UNION ALL SELECT 10004 ,'ABC','04-Apr-2012','IN', 71001002, 75 , 800.0
UNION ALL SELECT 10005 ,'ABC','10-Apr-2012','OUT', NULL ,125,NULL
UNION ALL SELECT 10006 ,'XYZ','05-Apr-2012','IN', 71001003, 150 , 350.0
UNION ALL SELECT 10007 ,'XYZ','05-Apr-2012','OUT', NULL , 120 ,NULL
UNION ALL SELECT 10008 ,'XYZ','15-Apr-2012','OUT', NULL , 10 ,NULL
UNION ALL SELECT 10009 ,'XYZ','20-Apr-2012','IN', 71001004, 90 , 340.0
UNION ALL SELECT 10010 ,'PQR','06-Apr-2012','IN', 71001005, 50 , 510.0
UNION ALL SELECT 10011 ,'PQR','15-Apr-2012','IN', 71001006, 60 , 505.0
UNION ALL SELECT 10012 ,'MNO','01-Apr-2012','IN', 71001007, 76 , 410.0
UNION ALL SELECT 10013 ,'MNO','11-Apr-2012','OUT', NULL ,76 ,NULL
;WITH remaining AS
(
SELECT *,
CASE
WHEN trantype = 'IN' THEN 1
ELSE -1
END * qty AS stock_shift,
ROW_NUMBER() OVER(PARTITION BY item ORDER BY transdate) AS row,
CASE
WHEN trantype = 'OUT' THEN NULL
ELSE ROW_NUMBER()OVER(PARTITION BY item, CASE WHEN trantype = 'IN' THEN 0 ELSE 1 END ORDER BY transdate)
END AS in_row,
SUM(CASE WHEN trantype = 'OUT' THEN qty END) OVER(PARTITION BY item) AS total_out
FROM #sample
)
,remaining2 AS
(
SELECT r1.item,
r1.stockid,
MAX(r1.transdate) AS transdate,
MAX(r1.trantype) AS trantype,
MAX(r1.batchno) AS batchno,
MAX(r1.qty) AS qty,
MAX(r1.price) AS price,
MAX(r1.total_out) AS total_out,
MAX(r1.in_row) AS in_row,
CASE
WHEN MAX(r1.trantype) = 'OUT' THEN NULL
WHEN SUM(CASE WHEN r1.trantype = 'IN' THEN r2.qty ELSE 0 END) - MAX(r1.total_out) < 0 THEN SUM(CASE WHEN r1.trantype = 'IN' THEN r2.qty ELSE 0 END)
- MAX(r1.total_out)
ELSE 0
END AS running_in
FROM remaining r1
LEFT OUTER JOIN remaining r2
ON r2.row <= r1.row
AND r2.item = r1.item
GROUP BY
r1.item,
r1.stockid
)
SELECT r2.item,
r2.stockid,
MAX(r2.transdate) AS transdate,
MAX(r2.trantype) AS trantype,
MAX(r2.batchno) AS batchno,
MAX(r2.qty) AS qty,
MAX(r2.price) AS price,
MAX(CASE WHEN r2.trantype = 'OUT' THEN NULL ELSE ISNULL(r2.qty + r3.running_in, 0) END) AS remaining_stock
FROM remaining2 r2
LEFT OUTER JOIN remaining2 r3
ON r2.in_row - 1 = r3.in_row
AND r2.item = r3.item
GROUP BY
r2.item,
r2.stockid
此sql出现问题，结果附在此处
值不匹配的记录以黄色显示。请帮助解决问题。
2 个答案:
答案 0 :(得分：1)
我认为这应该可以解决问题吗？
SELECT 10001 as stockid,'ABC' as item,'01-Apr-2012' as transdate,'IN' as trantype, 71001000 as batchno, 200 as qty, 750.0 as price INTO #sample
UNION ALL SELECT 10002 ,'ABC','02-Apr-2012','OUT', NULL ,100,NULL
UNION ALL SELECT 10003 ,'ABC','03-Apr-2012','IN', 71001001, 50 , 700.0
UNION ALL SELECT 10004 ,'ABC','04-Apr-2012','IN', 71001002, 75 , 800.0
UNION ALL SELECT 10005 ,'ABC','10-Apr-2012','OUT', NULL ,125,NULL
UNION ALL SELECT 10006 ,'XYZ','05-Apr-2012','IN', 71001003, 150 , 350.0
UNION ALL SELECT 10007 ,'XYZ','05-Apr-2012','OUT', NULL , 120 ,NULL
UNION ALL SELECT 10008 ,'XYZ','15-Apr-2012','OUT', NULL , 10 ,NULL
UNION ALL SELECT 10009 ,'XYZ','20-Apr-2012','IN', 71001004, 90 , 340.0
UNION ALL SELECT 10010 ,'PQR','06-Apr-2012','IN', 71001005, 50 , 510.0
UNION ALL SELECT 10011 ,'PQR','15-Apr-2012','IN', 71001006, 60 , 505.0
UNION ALL SELECT 10012 ,'MNO','01-Apr-2012','IN', 71001007, 76 , 410.0
UNION ALL SELECT 10013,'MNO','11-Apr-2012','OUT', NULL ,76 ,NULL
;with remaining_stock as
(
SELECT *
,CASE WHEN trantype = 'IN' THEN 1 ELSE -1 END * qty AS stock_shift
,row_number() OVER (PARTITION BY item ORDER BY transdate) as row
,CASE WHEN trantype = 'OUT' THEN NULL ELSE
row_number()OVER (PARTITION BY item,CASE WHEN trantype = 'IN' THEN 0 ELSE 1 END ORDER BY transdate) END as in_row
,CASE WHEN trantype = 'IN' THEN NULL ELSE
row_number()OVER (PARTITION BY item,CASE WHEN trantype = 'OUT' THEN 0 ELSE 1 END ORDER BY transdate) END as out_row
,ISNULL(SUM(CASE WHEN trantype = 'OUT' THEN qty END) OVER (PARTITION BY item),0) AS total_out
,ISNULL(SUM(CASE WHEN trantype = 'IN' THEN qty END) OVER (PARTITION BY item),0) AS total_in
FROM #sample
)
,remaining_stock2 AS
(
SELECT
r1.item
,r1.stockid
,MAX(r1.transdate) as transdate
,MAX(r1.trantype) as trantype
,MAX(r1.batchno) as batchno
,MAX(r1.qty) as qty
,MAX(r1.price) as price
,MAX(r1.total_in) as total_in
,MAX(r1.total_out) as total_out
,SUM(r2.qty) as running_in
FROM remaining_stock r1
LEFT OUTER JOIN remaining_stock r2 on r2.in_row <= r1.in_row
AND r2.item = r1.item
GROUP BY
r1.item
,r1.stockid
)
SELECT
item
,stockid
,transdate
,trantype
,batchno
,qty
,price
,CASE WHEN trantype = 'OUT' THEN NULL
WHEN total_out >= running_in THEN 0
WHEN (running_in - total_out) < qty THEN (running_in - total_out)
WHEN (running_in - total_out) >= qty THEN qty
END as remaining_stocks
FROM remaining_stock2
答案 1 :(得分：0)
关于如何应用FIFO逻辑，我的问题不是很清楚。我将假设您希望将每个IN记录与下一个OUT记录相关联（如果存在）。要实现这一点，您需要像以下
select
t1.BatchNo,
isnull(t1.Qty,0) as 'IN Qty',
isnull(t2.Qty,0) as 'OUT Qty',
isnull(t1.Qty,0) - isnull(t2.Qty,0) as 'Remaining Qty'
from
tbl_test t1
left join tbl_test t2
on t2.StockID = (t1.StockID + 1)
and t2.TranType = 'OUT'
where
t1.TranType = 'IN'
结果将显示您问题中ABC的前5条记录的以下内容。
BatchNo | IN Qty | OUT Qty | Remaining Qty 71001000 | 200 | 100 | 100 71001001 | 50 | 0 | 50 71001002 | 75 | 125 | -50
左连接的工作原理是每个IN记录的StockID总是比关联的OUT记录少一个。我个人认为您的数据模型需要改进。
- OUT记录应分配BatchNo或引用 相关IN记录的StockID
- 为顺序排序添加时间戳字段
- 添加DateTime字段以处理当天发生的IN / OUT
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