How to convert milliseconds to date in SQLite

Question

I store date from Calendar.getTimeInMilliseconds() in SQLite DB. I need to mark first rows by every month in SELECT statement, so I need convert time in milliseconds into an

Answer 1

Datetime expects epochtime, which is in number of seconds while you are passing in milliseconds. Convert to seconds & apply.

SELECT datetime(1346142933585/1000, 'unixepoch');

Can verify this from this fiddle

http://sqlfiddle.com/#!5/d41d8/223

Answer 2

One of SQLite's supported date/time formats is Unix timestamps, i.e., seconds since 1970. To convert milliseconds to that, just divide by 1000.

Then use some date/time function to get the year and the month:

SELECT strftime('%Y-%m', MillisField / 1000, 'unixepoch') FROM MyTable

Answer 3

Do you need to avoid milliseconds to date conversion or function to convert milliseconds to date? Since sqlite date functions work with seconds, then you can try to

• convert milliseconds in your query, like this
  select date(milliscolumn/1000,'unixepoch','localtime') from table1
• convert millis to seconds before saving it to db, and then use date function in sql query