Oracle SQL：根据固定的时间范围（例如15或30分钟）统计记录

我有一张类似于的桌子

Start time            |       End Time                 | User |
09/02/2021 03:01:13   |       09/02/2021 03:45:15      | ABC  |
09/02/2021 03:15:20   |       09/02/2021 05:03:20      | XYZ  |
09/02/2021 06:03:12   |       09/02/2021 06:15:30      | DEF  |

预期输出：

StDt                  |       EndDt                    | Count(1) 
09/02/2021 00:00:00   |       09/02/2021 01:00:00      | 0
09/02/2021 01:00:00   |       09/02/2021 02:00:00      | 0
09/02/2021 02:00:00   |       09/02/2021 03:00:00      | 0
09/02/2021 03:00:00   |       09/02/2021 04:00:00      | 2
09/02/2021 04:00:00   |       09/02/2021 05:00:00      | 1
09/02/2021 05:00:00   |       09/02/2021 06:00:00      | 0
09/02/2021 06:00:00   |       09/02/2021 07:00:00      | 1

本例中的时间间隔为每小时一次，但我希望在10分钟/15分钟/30分钟内保持灵活性。 我希望这是用单个sql编写的。 到目前为止，我所能做的就是如何生成范围

select t1.StartDt, t1.EndDt from 
(
  select 
    (to_char(timestamp '2021-02-09 00:00:00' + numtodsinterval(rownum*60,'MINUTE') - numtodsinterval(60,'MINUTE'),'DD-MM-YYYY hh24:mi')) as StartDt,
    (to_char(timestamp '2021-02-09 00:00:00' + numtodsinterval(rownum*60,'MINUTE'),'DD-MM-YYYY hh24:mi')) as EndDt
  from dual connect by level <= 24
) t1;

---

我不知道如何链接到上面提到的表以获得我需要的格式的数据。

您的启动非常好，除了在子查询中保留时间值的时间戳格式，并在结果显示阶段移动到主查询的_CHAR格式，同时使用相关子查询，并对重叠间隔进行明显计数聚合，并使用绑定变量作为时间部分值60、30、15的占位符，例如

SQL> var min number
SQL> exec :min := 60
 
PL/SQL procedure successfully completed
min
---------
60
 
SQL> SELECT TO_CHAR(t.StartDt,'DD-MM-YYYY HH24:MI') AS StartDt,
  2         TO_CHAR(t.EndDt,'DD-MM-YYYY HH24:MI') AS EndDt,
  3         ( SELECT COUNT(DISTINCT "User") 
                FROM tab 
               WHERE t.EndDt >= Start_Time 
                 AND t.StartDt <= End_Time ) AS Count
  4    FROM
  5    (
  6       SELECT timestamp '2021-02-09 00:00:00' +
  7                        numtodsinterval(rownum * :min, 'MINUTE') -
  8                        numtodsinterval(:min, 'MINUTE') AS StartDt,
  9              timestamp '2021-02-09 00:00:00' +
 10                        numtodsinterval(rownum * :min, 'MINUTE') AS EndDt
 11         FROM dual
 12      CONNECT BY level <= 24
 13    ) t
 14   ORDER BY StartDt;
 
STARTDT          ENDDT                 COUNT
---------------- ---------------- ----------
09-02-2021 00:00 09-02-2021 01:00          0
09-02-2021 01:00 09-02-2021 02:00          0
09-02-2021 02:00 09-02-2021 03:00          0
09-02-2021 03:00 09-02-2021 04:00          2
09-02-2021 04:00 09-02-2021 05:00          1
09-02-2021 05:00 09-02-2021 06:00          1
09-02-2021 06:00 09-02-2021 07:00          1
09-02-2021 07:00 09-02-2021 08:00          0
.....
.....