插入时循环遍历日期范围

1. 创建一个

   date

   表并使用

   JOIN

   。
2. 计算介于

   startdate

   和之间的天数

   enddate

3. 划分

   totalhours

   和

   totalwages

   按天计算。

这是我的解决方案：

SELECt a.empid, b.dd AS date,   CAST(a.totalhours AS decimal) / (DATEDIFF(day, startdate, enddate) + 1) AS hours,  CAST(a.totalwages AS decimal) / (DATEDIFF(day, startdate, enddate) + 1) AS wagesFROM wages aINNER JOIN dates b ON dd BETWEEN a.startdate AND a.enddate

结果

|  EMPID |       DATE |         HOURS |          WAGES |--------------------------------------------------------| ABC123 | 2013-01-01 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-02 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-03 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-04 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-05 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-06 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-07 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-08 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-09 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-10 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-11 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-12 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-13 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-14 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-15 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-16 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-17 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-18 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-19 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-20 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-21 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-22 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-23 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-24 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-25 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-26 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-27 | 5.71428571428 | 64.28571428571 || ABC123 | 2013-01-28 | 5.71428571428 | 64.28571428571 |

sqlfiddle