--- Steven Gearhart <[EMAIL PROTECTED]> wrote: > The easiest way to add a column is to get somebody > else to do it. > > Seriously, Use the "ALTER TABLE TableName ADD COLUMN > Company_id INT UNSIGNED > NULL" command.
Yes. But also, the company_id field probably should be reset 'not null' AFTER the new column has been populated with your favorite id type/sequence. J.C. > This syntax may be found in the MySQL manual in > 6.5.4 > http://www.mysql.com/doc/A/L/ALTER_TABLE.html ,or > page 428 if you have > downloaded the "pdf" version. > > I hope I have been of help. - Steve G. > > > -----Original Message----- > From: Ulrik Witschass [mailto:[EMAIL PROTECTED]] > Sent: Tuesday, March 26, 2002 3:33 PM > To: [EMAIL PROTECTED] > Subject: Adding a Column to an existing table > > > Hi, I'm new to this list, hopefully, I can > contribute some wisdom :) > > At the moment, I have to update a large database to > be multi-company-ready, > so I basically have to add a Column "Company_ID" to > nearly each table. > > What would be the easiest way to do this? > > I already thought about running a "SELECT *" Query > for each table, saving > the result in an Array (in PHP, btw, it's a > webapplication), dropping the > table, creating the new table and looping through > the data to insert the > data again. Problem is, that this puts a heavy task > on the server, I tried > it on a local "crash"-server, and even with > carefully planned setting and > unsetting of the arrays, it eats up the RAM since > the arrays just get damn > big. And since I have to remote control the server > and it is important that > the server is online nearly 24/7, I risk to crash > the server without having > the physical option to reboot it until the next > morning...a few hundred > kilometres away from my workplace... > > Now I am looking into two things: > > 1) is there some kind of "MODIFY" query I can run??? > > 2) or is it possible to dumb the database, drop it, > create the new structure > and then write the dumb back in with some options > that it ignores the > "CREATE TABLE" queries and that it doesn't check if > the count of the values > matches the count of the columns? (error I get when > I try to do it at the > moment). > > 3) another way... > > As you can see, I am not THAT experienced with > MySQL, so any help is greatly > appreciated!!! > > Ulrik > __________________________________________________ Do You Yahoo!? Yahoo! Movies - coverage of the 74th Academy Awards® http://movies.yahoo.com/ --------------------------------------------------------------------- Before posting, please check: http://www.mysql.com/manual.php (the manual) http://lists.mysql.com/ (the list archive) To request this thread, e-mail <[EMAIL PROTECTED]> To unsubscribe, e-mail <[EMAIL PROTECTED]> Trouble unsubscribing? Try: http://lists.mysql.com/php/unsubscribe.php
