查找一组 n 个连续数字是否在 SQL 中重复

Question

I want to find out if a set of n consecutive numbers are repeating for a particular partition.

Lets say I have deviceIds with some recordid whose value are in consecutive fashion each record that device generates is incremented by 1.

So I want to know if resetting the recordid and regenerating records with same sequence again. Lets understand by following table.

Device ID        recordid             DateTime
--------------------------------------------------
07777778999       2               18-12-2016 17:15
07777778123       10              18-12-2016 18:10
07777778123       10              18-12-2016 18:20
07777778999       3               19-12-2016 19:30
07777778999       4               19-12-2016 12:15
07777778999       5               19-12-2016 13:15
07777778999       6               20-12-2016 11:15
07777778123       11               20-12-2016 9:15
07777778123       12               20-12-2016 17:15
07777778123       13               20-12-2016 17:25
07777778123       14               20-12-2016 17:35
07777778999       7                20-12-2016 17:45
07777778999       8               20-12-2016 17:55
07777778999       4               20-12-2016 18:50
07777778999       5               20-12-2016 18:55 
07777778999       6               20-12-2016 18:50
07777778999       7               20-12-2016 18:55
...

There are many devices so we can partition it by devices and then apply our query to find if for a device, the numbers are regenerated like for example 07777778999, we had record id's 2,3,4,5,6,7,8 and then the numbers are regenerated from 4,5,6,7, etc.

So i want to list down all the devices with such regeneration using SQL. So the expected output for the above would be device 07777778999

Answer 1

Try this.

This will return all the records, which has the regenerated values.

SELECT DeviceID,RecordId
FROM ResultSet
GROUP BY DeviceID,RecordId
HAVING COUNT(1)>1;