MySQLi - Create Table - Adglob Infosystem Pvt Ltd

To begin with, the table creation command requires the following details −

Name of the table
Name of the fields
Definitions for each field

Syntax

Here is a generic SQL syntax to create a MySQL table −

CREATE TABLE table_name (column_name column_type);

Now, we will create the following table in the ADGLOB database.

create table adglob_tbl(
   adglob_id INT NOT NULL AUTO_INCREMENT,
   adglob_title VARCHAR(100) NOT NULL,
   adglob_author VARCHAR(40) NOT NULL,
   submission_date DATE,
   PRIMARY KEY ( adglob_id )
);

Here, a few items need explanation −

Field Attribute NOT NULL is being used because we do not want this field to be NULL. So, if a user will try to create a record with a NULL value, then MySQL will raise an error.
Field Attribute AUTO_INCREMENT tells MySQL to go ahead and add the next available number to the id field.
Keyword PRIMARY KEY is used to define a column as a primary key. You can use multiple columns separated by a comma to define a primary key.

Creating Tables from Command Prompt

It is easy to create a MySQL table from the mysql> prompt. You will use the SQL command CREATE TABLE to create a table.

Example

Here is an example, which will create adglob_tbl −

root@host# mysql -u root -p
Enter password:*******
mysql> use ADGLOB;
Database changed
mysql> CREATE TABLE adglob_tbl(
   → adglob_id INT NOT NULL AUTO_INCREMENT,
   → adglob_title VARCHAR(100) NOT NULL,
   → adglob_author VARCHAR(40) NOT NULL,
   → submission_date DATE,
   → PRIMARY KEY ( adglob_id )
   → );
Query OK, 0 rows affected (0.16 sec)
mysql>

NOTE − MySQL does not terminate a command until you give a semicolon (;) at the end of SQL command.

Creating Tables Using PHP Script

PHP uses mysqli query() or mysql_query() function to create a MySQL table. This function takes two parameters and returns TRUE on success or FALSE on failure.

Syntax

$mysqli→query($sql,$resultmode)

Sr.No.	Parameter & Description
1	$sqlRequired – SQL query to create a MySQL table.
2	$resultmodeOptional – Either the constant MYSQLI_USE_RESULT or MYSQLI_STORE_RESULT depending on the desired behavior. By default, MYSQLI_STORE_RESULT is used.

Example

Try the following example to create a table −

Copy and paste the following example as mysql_example.php −

<html>
   <head>
      <title>Creating MySQL Table</title>
   </head>
   <body>
      <?php
         $dbhost = 'localhost';
         $dbuser = 'root';
         $dbpass = 'root@123';
         $dbname = 'ADGLOB';
         $mysqli = new mysqli($dbhost, $dbuser, $dbpass, $dbname);
         
         if($mysqli→connect_errno ) {
            printf("Connect failed: %s<br />", $mysqli→connect_error);
            exit();
         }
         printf('Connected successfully.<br />');
   
         $sql = "CREATE TABLE adglob_tbl( ".
            "adglob_id INT NOT NULL AUTO_INCREMENT, ".
            "adglob_title VARCHAR(100) NOT NULL, ".
            "adglob_author VARCHAR(40) NOT NULL, ".
            "submission_date DATE, ".
            "PRIMARY KEY ( adglob_id )); ";
         if ($mysqli→query($sql)) {
            printf("Table adglob_tbl created successfully.<br />");
         }
         if ($mysqli→errno) {
            printf("Could not create table: %s<br />", $mysqli→error);
         }
         $mysqli→close();
      ?>
   </body>
</html>

Output

Access the mysql_example.php deployed on apache web server and verify the output.

Connected successfully.
Table adglob_tbl created successfully.