The data I am working with can be updated over time and its important that the aggregations being calculated are based on the most recent update. So for example I have the following table below.
ID
Customers
UpdateTime
1
10
2018-01-03 00:00:00
1
15
2018-01-02 00:00:00
1
20
2018-01-01 00:00:00
2
5
2017-01-02 00:00:00
2
8
2017-01-03 00:00:00
2
50
2017-01-01 00:00:00
I want to sum customers across ID's based on their max update time so from this table I want my sum of customers to equal 18.
10 from ID=1 where max Update is 2018-01-03 00:00:00 and 8 from ID=2 where max UpdateTime is 2017-01-03 00:00:00 .
