Hi,
I have data set, where one column is CUSTOMER and other is REVENUE & third is DATE.
i want to convert the date to sort it in order, then compare quarterly revenue of a particular Customer.
i am not sure, how exactly should i group it into quarters and then compare.
should i group it and use lag function to compare?
Here is the sample data
| CUSTOMER | REVENUE | DATE |
| ACSS | 23444 | Apr- 19 |
| ACSS | 34221 | Aug-18 |
| ACSS | 45523 | Jun-19 |
| DELI | 982762 | Aug-19 |
| DELI | 376910 | Dec-18 |
| DELI | 163791 | Apr-19 |