Question

我有3列

ID
TIMESTAMP
CALLS

我需要按小时总结电话号码。示例

ID         TIMESTAMP          CALLS
1     10-01-2013 01:00:23       23
2     10-01-2013 03:00:23       55
3     10-01-2013 05:00:23       2369
4     10-01-2013 04:00:23       12
5     10-01-2013 01:00:23       1
6     10-01-2013 12:00:23       99
7     10-01-2013 01:00:23       22
8     10-01-2013 02:00:23       3

输出结果应该类似于

 TimestampHOUR       Totalcalls
  10/1/2013 01:00       46
  10/1/2013 02:00       3
  10/1/2013 03:00       55
  10/1/2013 04:00       12
  10/1/2013 05:00       2369
  10/1/2013 11:00       99

我已经尝试过使用datepart，hour（timestamp），但我想我的oracle版本不支持它。

Answer 1

SELECT   TRUNC(timestamp, 'HH24') AS hour, COUNT(*) AS TotalCalls
FROM     some_table
GROUP BY TRUNC(timestamp, 'HH24')

Answer 2

您应该将日期时间截断为小时，然后分组。样本舍入到小时：

select TRUNC (sysdate,'hh') from dual

see results

SQL SUM DATA by Hour

2 个答案: