Solution 1:
FROM_UNIXTIME()
Solution 2:
select from_unixtime(column,'%Y-%m-%d') from myTable;
Solution 3:
SELECT FROM_UNIXTIME(mycolumn)
FROM mytable
FROM_UNIXTIME()
select from_unixtime(column,'%Y-%m-%d') from myTable;
SELECT FROM_UNIXTIME(mycolumn)
FROM mytable