查询如何在sql中添加缺失的日期

Question

需要知道如何添加相应字段中缺少空数据的日期

**05/28/2012    NULL
05/29/2012  NULL
05/30/2012  NULL
05/30/2012  Break In
05/30/2012  Break Out
05/31/2012  NULL**

06/03/2012  NULL
06/03/2012  Break In
06/03/2012  Break Out
06/03/2012  In Duty
06/03/2012  Out Duty
06/04/2012  NULL
06/04/2012  In Duty
06/04/2012  Out Duty
06/05/2012  NULL
06/05/2012  Break In
06/05/2012  Break Out
06/06/2012  NULL
06/06/2012  Break In
06/06/2012  Break Out
06/06/2012  In Duty
06/06/2012  Out Duty
06/07/2012  NULL
06/07/2012  In Duty
06/07/2012  Out Duty

06/10/2012  NULL
06/10/2012  Break Out
06/10/2012  In Duty
06/10/2012  Out Duty
06/11/2012  NULL
06/11/2012  In Duty
06/11/2012  Out Duty
06/12/2012  NULL
06/13/2012  NULL
06/14/2012  NULL

我需要的结果是这样的：

05/28/2012  NULL
05/29/2012  NULL
05/30/2012  NULL
05/30/2012  Break In
05/30/2012  Break Out
05/31/2012  NULL
06/01/2012      null
06/02/2012      null
06/03/2012  NULL
06/03/2012  Break In
06/03/2012  Break Out
06/03/2012  In Duty
06/03/2012  Out Duty
06/04/2012  NULL
06/04/2012  In Duty
06/04/2012  Out Duty
06/05/2012  NULL
06/05/2012  Break In
06/05/2012  Break Out
06/06/2012  NULL
06/06/2012  Break In
06/06/2012  Break Out
06/06/2012  In Duty
06/06/2012  Out Duty
06/07/2012  NULL
06/07/2012  In Duty
06/07/2012  Out Duty
06/08/2012      null
06/09/2012      null
06/10/2012  NULL
06/10/2012  Break Out
06/10/2012  In Duty
06/10/2012  Out Duty
06/11/2012  NULL
06/11/2012  In Duty
06/11/2012  Out Duty
06/12/2012  NULL
06/13/2012  NULL
06/14/2012  NULL

Answer 1

最好的选择是保留一个日历表，其中包含您想要计算的某些年份的所有日期，然后与该表进行左连接

select date,col1
from calender_table c
left join 
your_table t
on c.[date]=t.[date]

您可以非常轻松地创建日历表。网络上有很多可用的脚本。 点击查看示例