Group by month in SQLite

Question

I have an SQLite database which contains transactions, each of them having a price and a transDate.

I want to retrieve the sum of the transactions

Answer 1

In Sqlite, if you are storing your date in unixepoch format, in seconds:

select count(myDate) as totalCount, 
strftime('%Y-%m', myDate, 'unixepoch', 'localtime') as yearMonth
from myTable group by strftime('%Y-%m', myDate, 'unixepoch', 'localtime');

If you are storing the date in unixepoch format, in milliseconds, divide by 1000:

select count(myDate/1000) as totalCount, 
strftime('%Y-%m, myDate/1000, 'unixepoch', 'localtime') as yearMonth
from myTable group by strftime('%Y-%m, myDate/1000, 'unixepoch', 'localtime');