Retrieve date wise data from database in Android

Question

In my database I have 1 table with date as one of the column, which stores the date when user add some data in my table.

Now I want to retrieve the data

Answer 1

If you want to "automatically" load the current year/month, use SQLite's strftime function with 'now' modifier & '%Y-%m' format mask.

select strftime('%Y-%m', 'now');

Now, coming to your question:

Now I want to retrieve the data for the current month alone.

Well, here comes a mess. You can't store the date as a datetime type, instead it's stored as a string in a format SQLite can't parse using date functions. So you'll have to convert it into a format which SQLite can understand.

You can do that by using the usual substr function

substr(exp_date, 7) || '-' || substr(exp_date, 4,2) || '-' || substr(exp_date, 1,2)

So this will covert dd/mm/yyyy to YYYY-mm-dd format.

So the full query will be:

SELECT *
FROM   incomexpense
WHERE  Strftime('%Y-%m', 'now') = Strftime('%Y-%m', Substr(exp_date, 7)
                                                    || '-'
                                                    || Substr(exp_date, 4, 2)
                                                    || '-'
                                                    || Substr(exp_date, 1, 2)) 

See how this works over here.