I tried LAG function in mySQL transform, but it appered to be missing. Is this correct?
Domo uses MySQL 5.6+
@VERSION for the exact version number.
This version of MySQL predates the implementation of Windowed functions.
You can recreate it using user defined variables.
https://stackoverflow.com/questions/3333665/rank-function-in-mysql
Without performance tuning in MySQL, you'll probably get faster performance using MagicETL if you start using larger datasets.
If you create a Redshift transform instead of SQL, you can use LAG. I was shown how to create a Redshift dataflow to get active clients by month using start and end date on the client record.
