从员工表

Question

以下是我的表数据

       id   in  out part date
       1    20  10  1   2005-02-02
       2    10  30  1   2005-02-03
       3    20  50  2   2005-02-04
       4    20  30  3   2005-02-05
       5    100 10  3   2005-02-06
       6    20  2   2   2005-02-07

我的期初余额条件是

  

如果我选择日期范围2到7然后打开余额            （in）形式2到7的总和 - （out）从2到6的总和

Answer 1

使用SUM

组

openss7/src/drivers/clone.c:216:cloneopen(struct inode *inode, struct file *file)

输出：

SELECT part, 
SUM(in)-(SELECT SUM(a.out) FROM yourtable a WHERE a.date BETWEEN '2005-02-02' AND '2005-02-06' AND a.part = part) AS OpeningBalance, 
SUM(in)-SUM(out) AS ClosingBalance
FROM yourtable
WHERE date BETWEEN '2005-02-02' AND '2005-02-07'
GROUP BY part

SQL FIDDLE：http://sqlfiddle.com/#!3/747c0f/8/0

（在小提琴中，我使用名称ina和outa作为in和out是保留字。