![]() If you want to modify a column in an existing table you need to use the ALTER TABLE and MODIFY statements together: How to modify an existing column in a table using the Alter Table in MySQL ALTER TABLE contacts MODIFY first_name varchar2(100) not null Īlso, using the SQL command line you are allowed to delete a column from a table. To rename the table ‘phonebook’ to 'contacts' you need to use the query below: An example of how to rename a table using the Alter Table in MySQL ALTER TABLE phonebook RENAME TO contactsĪlso, if you want to rename a column from 'last_name' to 'first_name' in the 'contacts' table, use this query: An example of how to rename a column in a table using the Alter Table in MySQL ALTER TABLE contacts RENAME COLUMN last_name to first_name To add a column called ' email' in the 'phonebook' MySQL table you can use a query similar to the one below: An example of how to add a column using the Alter Table in MySQL ALTER TABLE phonebook ADD COLUMN email VARCHAR(128) adds a new column 'email' into 'phonebook' tableĪlso, you can rename a table or a column in a table. Once logged on the server you can manage your database tables using the ALTER TABLE statement. How to log in to a specific database on a MySQL server: mysql -u myuser -p'mypass' db_phonebook To enter the command line you need to establish a connection to the server via a terminal or an SSH client, and then log in to the server using the root or other account with the appropriate rights. The most commonly used method for managing a database table is the MySQL Server-inbuilt SQL command line. How to Alter a table via the SQL command line? Also, such options are available via the graphic interface of popular MySQL administration tools such as phpMyAdmin, or by using a MySQL query in a PHP script. Also, it can be used to add, modify or drop a column from an existing table. ![]() Using the ALTER TABLE statement you are able to rename an existing table. This is done through the MySQL-alter-table option in the command line. The possibility to manage MySQL tables' settings is the key to keeping the information on your website always up to date and secure. ![]() This includes many key operations such as create user, create database and create table. The management of MySQL databases is one of the basic tasks that the owner of a content-loaded website has to deal with. ![]()
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