Mysql updating dates in a table

[JD Austin]

If the current column was a date type there had to be a ton of failures!
If you have unique values in the data you can just craft update statements
from the csv file. Use excel/OO Calc, perl, etc to parse apart the original
file to create update table statements that you can pipe back to mysql after
you test a few.

--
JD Austin
Twin Geckos Technology Services LLC
jd at twingeckos.com
480.288.8195x201
http://www.twingeckos.com


Jonathan Swift<http://www.brainyquote.com/quotes/authors/j/jonathan_swift.html>
- "May you live every day of your life."

On Tue, Aug 4, 2009 at 4:26 PM, Craig White <craigwhite at azapple.com> wrote:

> On Tue, 2009-08-04 at 16:21 -0700, JD Austin wrote:
> > http://dev.mysql.com/doc/refman/5.0/en/date-and-time-functions.html
> > You can use Str_to_date to convert it to a date.
> > Date/timestamp data should be one of the date types (Datetime, date,
> > timestamp).
> > I'd do it like this (all sql and won't lose data):
> >      1. Add a column to the table that is date/datetime/timestamp (in
> >         your case date looks right)
> >      2. update the new column using the str_to_date function
> >      3. Check for rows that have nulls in that column - fix them
> >      4. set the existing column value to NULL
> >      5. change the column to a date using alter table.
> >      6. update the column to be whatever you called the new column you
> >         added.
> >      7. Drop the new column that you added.
> >      8. add not null constraint to your original date column
> ----
> Yes, I am on dev.mysql.com... (v5.0 is correct too)
>
> OK, well they imported as dates...just wrong dates, completely wrong
> dates.
>
> I have done 'set' the contents of one field from another field before I
> think...that was easy.
>
> So how would I import records with the same primary key and just add a
> new date field to the existing records with matching primary key?
>
> Craig
>
>
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