Creating a database using mysqladmin

We can log in MySQL After service , Use create Command create database , The grammar is as follows :

CREATE DATABASE  Database name ;

The following command simply demonstrates the process of creating a database , The data name is RUNOOB:

[[email protected]]# mysql -u root -p   
Enter password:******  #  Enter the terminal after logging in 

mysql> create DATABASE RUNOOB;

Use mysqladmin Create database

Use ordinary users , You may need specific permissions to create or delete MySQL database .

So we use root The user login ,root The user has the highest authority , have access to mysql mysqladmin Command to create a database .

The following command simply demonstrates the process of creating a database , The data name is RUNOOB:

[[email protected]]# mysqladmin -u root -p create RUNOOB
Enter password:******

After the above command is executed successfully, it will create MySQL database RUNOOB.

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Use PHP Script Create database

PHP Use mysqli_query Function to create or delete MySQL database .

This function takes two arguments , Returns... On successful execution TRUE, Otherwise return to FALSE.

grammar

mysqli_query(connection,query,resultmode);

Parameters	describe
connection	It's necessary . Stipulate what to use MySQL Connect .
query	It's necessary , Specify the query string .
resultmode	Optional . A constant . It can be any of the following values ：MYSQLI_USE_RESULT（ If you need to retrieve a lot of data , Please use this ）MYSQLI_STORE_RESULT（ Default ）

• MYSQLI_USE_RESULT（ If you need to retrieve a lot of data , Please use this ）
• MYSQLI_STORE_RESULT（ Default ）

example

The following example demonstrates the use of PHP To create a database ：

Create database

<?php
$dbhost = 'localhost';  // mysql Server host address 
$dbuser = 'root';            // mysql user name 
$dbpass = '123456';          // mysql User name, password 
$conn = mysqli_connect($dbhost, $dbuser, $dbpass);
if(! $conn )
{
  die(' Connection error : ' . mysqli_error($conn));
}
echo ' Successful connection <br />';
$sql = 'CREATE DATABASE RUNOOB';
$retval = mysqli_query($conn,$sql );
if(! $retval )
{
    die(' Failed to create database : ' . mysqli_error($conn));
}
echo " database  RUNOOB  Create success \n";
mysqli_close($conn);
?>