Many ways to add column to existing table in MySQL. If you r using GUI tools, add column to table in MySQL is easy. If you are using CLI, then here’s the command to add column in MySQL table.
To add column in existing table, you may refer to the 2 examples below:-
Advertisements
Example I: Add new varchar column to the end of the table
|
1 |
ALTER TABLE `tablename_here` ADD `new_column_name` VARCHAR( 255 ) NOT NULL ; |
Example II: Add new integer column after an existing column in table
|
1 |
ALTER TABLE `tablename_here` ADD `new_column_name` INT NOT NULL AFTER `existing_column` ; |
It’s simple to add column to existing table right? 🙂
Related posts:
How to create App Tab in Firefox 5
How to do string replace (str_replace) in MySQL
How to set print area in Calc - OpenOffice
WordPress: How to upload image using script?
How to shrink worksheet for printing in Calc - OpenOffice
How to hide apache2 version number in error page
Mod Security - Open source Web Application Firewall
How to set out of office auto responder in Zimbra
Share this with your friends:-
ok. I already know how to do it:
alter table table_name add column user_id int, add foreign key(user_id) references user(id);
and if the new key is a constraint, like a foreign key?