PHP MySQL creates database and table examples

2. //Create database

3. $con = mysql_connect("localhost","peter","abc123");

4. if ( !$con)

5. {

6. die('Could not connect: ' . mysql_error());

7. }

• if (mysql_query("CREATE D ATABASE my_db", $con))

• { bbs.it-home.org

• echo "Database created";

• }

• else

• {

• e cho "Error creating database : " . mysql_error();

• }

• mysql_close($con);

• ?>

• 2, create table CREATE TABLE is used to create a database table in MySQL.

  Grammar CREATE TABLE table_name ( column_name1 data_type, column_name2 data_type, column_name3 data_type, ....... ) In order to execute this command, I have to add a CREATE TABLE statement to the mysql_query() function.

  Example, create a table named "Persons" with three columns. The column names are "FirstName", "LastName" and "Age":

  
  

1. 
   

2. 
   

3. $ con = mysql_connect("localhost ","peter","abc123");

4. if (!$con)

5. {

6. die('Could not connect: ' . mysql_error());

7. }
D // Create database
if (mysql_query ("Create DataBase My_db", $ Con) {bbs.it-home.org

echo "database created";

}

else

{

echo "Error creating database: " . mysql_error();

}

// Create table in my_db database

mysql_select_db ("my_db", $con);

$sql = "CREATE TABLE Persons

(

FirstName varchar(15),

LastName varchar(15),

Age int

)";

mysql_query($sql,$con);

mysql_close($con);

?>

Copy code

Important: Before creating a table, you must first select the database. Select the database through the mysql_select_db() function.

Note: When you create a database field of varchar type, you must specify the maximum length of the field, for example: varchar(15).

MySQL data types Various MySQL data types:

$sql = "CREATE TABLE Persons

(

1. personID int NOT NULL AUTO_INCREMENT,

2. PRIMARY KEY(personID) ,

3. FirstName varchar(15),

4. LastName varchar(15),

5. Age int

6. )";
mysql_query($ sql,$con);