Simply convert 5 digit number in mysql database to a date

Question

I have been looking all over the web for this answer but dont understand all the things that were written. I try to do the from unix_timestamp() but it returns the wrong date. W

Answer 1

To go from Excel values, try this:

select date('1899-12-30') + interval <number> days

For instance:

select date('1899-12-30') + interval 40000 days

Returns July 6, 2009, just as it does in Excel.

In other words, you can bring the value in as an integer and then do the conversion in SQL.

I'm actually a little surprised because the 0 date on Excel is essentially Jan 0, 1900, which is Dec 31, 1899. I suspect there is an issue with the lack of leap year in 1900. Excel has the value of "60" represented as Feb 29,1900. This is amusing, I hadn't realized that Excel had this bug.

So, the above code works, for all values greater than 61.

Answer 2

Try This

        $date_format = floor($excelDateTime);
        $time_format = $excelDateTime - $date_format;
        $mysql_strdate = ($date_format > 0) ? ( $date_format - 25569 ) * 86400 + $time_format * 86400 :    $time_format * 86400;
        $mysql_date_format = date("Y-d-m", $mysql_strdate);