我有以下字段（part_code，stock_date，beginning_stock，stock_in，stock_out，stock_balance）的示例数据： part_code stock_date beginning_stock stock_in stock_out stock_balance
part_code stock_date beginning_stock stock_in stock_out stock_balance
A 1/1/2013 79 0 0 79
B 1/1/2013 3 0 0 3
C 1/1/2013 93 0 0 93
D 1/1/2013 47 0 0 47
E 1/1/2013 77 0 0 77
F 1/1/2013 34 0 0 34
G 1/1/2013 143 0 0 143
C 1/2/2013 0 0 -27 0
G 1/2/2013 0 0 -1 0
A 1/3/2013 0 0 -4 0
C 1/3/2013 0 0 -6 0
D 1/3/2013 0 0 -5 0
E 1/3/2013 0 0 -4 0
G 1/3/2013 0 0 -3 0
C 1/4/2013 0 0 -11 0
D 1/4/2013 0 0 -14 0
E 1/4/2013 0 0 -3 0
G 1/4/2013 0 9 -1 0
A 1/5/2013 0 0 -4 0
D 1/5/2013 0 0 -1 0
E 1/5/2013 0 0 -5 0
G 1/5/2013 0 76 0 0
A 1/8/2013 0 0 -3 0
C 1/8/2013 0 0 -12 0
D 1/8/2013 0 0 -4 0
E 1/8/2013 0 0 -7 0
G 1/8/2013 0 14 -3 0
A 1/9/2013 0 0 -4 0
B 1/9/2013 0 26 0 0
C 1/9/2013 0 0 -8 0
D 1/9/2013 0 0 -4 0
E 1/9/2013 0 0 -4 0
G 1/9/2013 0 0 -13 0
A 1/10/2013 0 0 -6 0
B 1/10/2013 0 24 0 0
C 1/10/2013 0 0 -9 0
D 1/10/2013 0 0 -7 0
E 1/10/2013 0 0 -4 0
G 1/10/2013 0 1 -16 0
我希望有一个循环来通过part_code更新每天的beginning_stock和stock_balance，如下所示：
part_code stock_date beginning_stock stock_in stock_out stock_balance
A 1/1/2013 79 0 0 79
B 1/1/2013 3 0 0 3
C 1/1/2013 93 0 0 93
D 1/1/2013 47 0 0 47
E 1/1/2013 77 0 0 77
F 1/1/2013 34 0 0 34
G 1/1/2013 143 0 0 143
C 1/2/2013 93 0 -27 66
G 1/2/2013 143 0 -1 142
A 1/3/2013 79 0 -4 75
C 1/3/2013 66 0 -6 60
D 1/3/2013 47 0 -5 42
E 1/3/2013 77 0 -4 73
G 1/3/2013 142 0 -3 139
C 1/4/2013 60 0 -11 49
D 1/4/2013 42 0 -14 28
E 1/4/2013 73 0 -3 70
G 1/4/2013 139 9 -1 147
A 1/5/2013 75 0 -4 71
D 1/5/2013 28 0 -1 27
E 1/5/2013 70 0 -5 65
G 1/5/2013 147 76 0 223
A 1/8/2013 71 0 -3 68
C 1/8/2013 49 0 -12 37
D 1/8/2013 27 0 -4 23
E 1/8/2013 65 0 -7 58
G 1/8/2013 223 14 -3 234
A 1/9/2013 68 0 -4 64
B 1/9/2013 3 26 0 29
C 1/9/2013 37 0 -8 29
D 1/9/2013 23 0 -4 19
E 1/9/2013 58 0 -4 54
G 1/9/2013 234 0 -13 221
A 1/10/2013 64 0 -6 58
B 1/10/2013 29 24 0 53
C 1/10/2013 29 0 -9 20
D 1/10/2013 19 0 -7 12
E 1/10/2013 54 0 -4 50
G 1/10/2013 221 1 -16 206
第一天的 stock_balance 将在第二天变为 beginning_stock 的 balance_stock = beginning_stock + stock_in + stock_out
任何帮助。感谢。
答案 0 :(得分：1)
这会给你预期的结果：
CREATE TABLE #TABLE(part_code VARCHAR(5), stock_date DATE, beginning_stock INT,stock_in INT, stock_out INT, stock_balance INT)
INSERT INTO #TABLE(part_code, stock_date, beginning_stock, stock_in, stock_out, stock_balance)
VALUES
('A','1/1/2013', 79 ,0 ,0 ,79),
('B','1/1/2013', 3 ,0 ,0 ,3 ),
('C','1/1/2013', 93 ,0 ,0 ,93),
('D','1/1/2013', 47 ,0 ,0 ,47),
('E','1/1/2013', 77 ,0 ,0 ,77),
('F','1/1/2013', 34 ,0 ,0 ,34),
('G','1/1/2013', 143 ,0 ,0 ,14),
('C','1/2/2013', 0 ,0 ,-27 ,0 ),
('G','1/2/2013', 0 ,0 ,-1 ,0 ),
('A','1/3/2013', 0 ,0 ,-4 ,0 ),
('C','1/3/2013', 0 ,0 ,-6 ,0 ),
('D','1/3/2013', 0 ,0 ,-5 ,0 ),
('E','1/3/2013', 0 ,0 ,-4 ,0 ),
('G','1/3/2013', 0 ,0 ,-3 ,0 ),
('C','1/4/2013', 0 ,0 ,-11 ,0 ),
('D','1/4/2013', 0 ,0 ,-14 ,0 ),
('E','1/4/2013', 0 ,0 ,-3 ,0 ),
('G','1/4/2013', 0 ,9 ,-1 ,0 ),
('A','1/5/2013', 0 ,0 ,-4 ,0 ),
('D','1/5/2013', 0 ,0 ,-1 ,0 ),
('E','1/5/2013', 0 ,0 ,-5 ,0 ),
('G','1/5/2013', 0 ,76 ,0 ,0 ),
('A','1/8/2013', 0 ,0 ,-3 ,0 ),
('C','1/8/2013', 0 ,0 ,-12 ,0 ),
('D','1/8/2013', 0 ,0 ,-4 ,0 ),
('E','1/8/2013', 0 ,0 ,-7 ,0 ),
('G','1/8/2013', 0 ,14 ,-3 ,0 ),
('A','1/9/2013', 0 ,0 ,-4 ,0 ),
('B','1/9/2013', 0 ,26 ,0 ,0 ),
('C','1/9/2013', 0 ,0 ,-8 ,0 ),
('D','1/9/2013', 0 ,0 ,-4 ,0 ),
('E','1/9/2013', 0 ,0 ,-4 ,0 ),
('G','1/9/2013', 0 ,0 ,-13 ,0 ),
('A','1/10/2013', 0 ,0 ,-6 ,0 ),
('B','1/10/2013', 0 ,24 ,0 ,0 ),
('C','1/10/2013', 0 ,0 ,-9 ,0 ),
('D','1/10/2013', 0 ,0 ,-7 ,0 ),
('E','1/10/2013', 0 ,0 ,-4 ,0 ),
('G','1/10/2013', 0 ,1 ,-16 ,0 );
SELECT T1.part_code,stock_date,
COALESCE
(
(SELECT SUM(t2.beginning_stock + T2.stock_in + T2.stock_out) FROM #TABLE T2 WHERE T2.part_code = T1.part_code AND T2.stock_date < T1.stock_date ) ,
beginning_stock
)AS beginning_stock ,
stock_in, stock_out,
(SELECT ISNULL(SUM(t2.beginning_stock + T2.stock_in + T2.stock_out),0) FROM #TABLE T2 WHERE T2.part_code = T1.part_code AND T2.stock_date <= T1.stock_date ) AS stock_balance
FROM #TABLE T1
ORDER BY T1.stock_date,T1.part_code