====== Getting started with MySQL ====== The following are examples of how to get started on a database of registrations, called registrations. ===== Creating a new database ===== mysqladmin -u root -p create registrations ===== Logging into MySQL as root ==== mysql -u root -p ===== Creating a user for your new database ===== grant all privileges on registrations.* to 'registrations'@'localhost' identified by 'somepassword'; flush privileges; ===== Show all databases ==== show databases; ===== Opening your database ===== use registrations; ===== Showing database's tables ===== show tables; ===== Creating your first table ===== CREATE TABLE registrations ( id int(11) NOT NULL auto_increment, name varchar(255), email varchar(255), address text, PRIMARY KEY (id) ) TYPE=MyISAM; ===== Showing the structure of this table ===== DESC registrations; ===== Removing this table if you want to start again ===== DROP TABLE registrations; ===== Inserting data into this table ===== INSERT INTO registrations SET name='Andrew McDonough', email='andrew@andrew.com', address='1 High Street'; ===== Getting data out of the table ===== SELECT * FROM registrations; SELECT id,name FROM registrations; SELECT id,name FROM registrations where id=1; SELECT * FROM registrations where name like '%ndrew%'; ===== Useful field types ===== * int(11) - Integer (1,2,3...) * varchar(255) - String up to 255 characters * text - String of unlimited length * date - Date * datetime - Date and time * enum('Yes','No') - Enumeration only allowing the values Yes and No ====== Connecting to MySQL from PHP ====== ===== Creating a database handle ===== To connect to MySQL from PHP, you will need to connect to the database and get a database **handle**. I tend to assign this to the variable **$dbh** $dbh = @mysql_pconnect(DB_HOST, DB_USER, DB_PASS); ===== Opening the database ==== @mysql_select_db(DB_NAME,$dbh); ===== Inserting a record into the database ===== $query = "INSERT INTO registrations SET name='Andrew', email='andrew@andrew.com', address='1 South Street'"; $result = @mysql_query($query,$dbh); ===== Fetching a record from the database ===== $query = "SELECT * FROM registrations WHERE id='1'"; $result = @mysql_query($query,$dbh); $record = @mysql_fetch_array($result); ===== Fetching all query results into an associative array ====== $query = "SELECT * FROM registrations"; $result=@mysql_query($query,$dbh); $result = array(); while($row=@mysql_fetch_array($result)){ array_push($result,$row); }