我该如何从第二栏中运行总计 [英] How do i do running totals from second column
本文介绍了我该如何从第二栏中运行总计的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
我有一个如下数据集,
Lot Size Reported QTY Qty Balance
150 100
150 100
150 80
150 80
150 5
数量余额"需要计算如下,
The Qty Balance needs to calculated as follows,
Row 1 = Lot Size - Reported Qty (row1) => 150-100 = 50
Row 2 = Reported Qty (row1) - Reported Qty(row2) => 100-100 =0
Row 3 = Reported Qty (row2) - Reported Qty(row3) => 100-80 =20
... till the last row
我的预期结果是
Lot Size Reported QTY Qty Balance
150 100 50
150 100 0
150 80 20
150 80 0
150 5 75
如何在查询中实现这一目标?
How do I achieve this in a query?
推荐答案
Oracle 11g R2架构设置:
CREATE TABLE lots ( Lot_Size, Reported_QTY ) AS
SELECT 150, 100 FROM DUAL
UNION ALL SELECT 150, 100 FROM DUAL
UNION ALL SELECT 150, 80 FROM DUAL
UNION ALL SELECT 150, 80 FROM DUAL
UNION ALL SELECT 150, 5 FROM DUAL;
查询1 :
SELECT Lot_Size,
Reported_QTY,
COALESCE( LAG( Reported_QTY ) OVER ( ORDER BY NULL ) - Reported_QTY,
Lot_Size - Reported_QTY ) AS Qty_Balance
FROM Lots
结果 :
Results:
| LOT_SIZE | REPORTED_QTY | QTY_BALANCE |
|----------|--------------|-------------|
| 150 | 100 | 50 |
| 150 | 100 | 0 |
| 150 | 80 | 20 |
| 150 | 80 | 0 |
| 150 | 5 | 75 |
这篇关于我该如何从第二栏中运行总计的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持IT屋!
查看全文