Question

I’m trying to convert this string “0x00009F0900000000” into a date either through MySql or Rails as I’m working on a migration.

Can’t find what format it is. Doesn’t look like there’s a way to convert hexadecimal value into a date through rails or mysql.

Solution found here: how to cast the hexadecimal to varchar(datetime)?

SELECT 
      CAST(
          '1900-01-01 00:00:00' + 
          INTERVAL CAST(CONV(substr(HEX(BinaryData),1,8), 16, 10)  AS SIGNED) DAY +
          INTERVAL CAST(CONV(substr(HEX(BinaryData),9,8), 16, 10)  AS SIGNED)* 10000/3 MICROSECOND
      AS DATETIME) AS converted_datetime
FROM
(
SELECT 0x00009F0900000000 AS BinaryData
) d

Answer 1

In ruby (and ignoring time)

require 'date'
str =  "0x00009F0900000000"
p Date.new(1900,1,1) + str[0..9].hex
#<Date: 2011-06-21 ((2455734j,0s,0n),+0s,2299161j)>