Converting a date string which is before 1970 into a timestamp in MySQL

Question

Not a very good title, so my apologies.

For some reason, (I wasn\'t the person who did it, i digress) we have a table structure where the field type for a date is va

Answer 1

To get the max. Range +/- wise use this query on your birthday field, in my case "yyyy-mm-dd" but you can change it to your needs

select name, (@bday:=STR_TO_DATE(birthday,"%Y-%m-%d")),if(year(@bday)<1970,UNIX_TIMESTAMP(affffdate(@bday, interval 68 year))-2145916800,UNIX_TIMESTAMP(@bday)) from people