Develop Plus

Drop Database using mysqladmin:

You would need special privileges to create or to delete a MySQL database. So assuming you have access to root user, you can create any database using mysql mysqladmin binary.

Be careful while deleting any database because you will lose your all the data available in your database.

Here is an example to delete a database created in previous chapter:

[root@host]# mysqladmin -u root -p drop TUTORIALS
Enter password:******

This will give you a warning and it will confirm if you really want to delete this database or not.

Dropping the database is potentially a very bad thing to do.
Any data stored in the database will be destroyed.

Do you really want to drop the 'TUTORIALS' database [y/N] y
Database "TUTORIALS" dropped

Drop Database using PHP Script:

PHP uses mysql_query function to create or delete a MySQL database. This function takes two parameters and returns TRUE on success or FALSE on failure.

Syntax:

bool mysql_query( sql, connection );

Parameter	Description
sql	Required - SQL query to create or delete a MySQL database
connection	Optional - if not specified, then last opened connection by mysql_connect will be used.

Example:

Try out the following example to delete a database:

<html>
<head>
<title>Deleting MySQL Database</title>
</head>
<body>
<?php
$dbhost = 'localhost:3036';
$dbuser = 'root';
$dbpass = 'rootpassword';
$conn = mysql_connect($dbhost, $dbuser, $dbpass);
if(! $conn )
{
  die('Could not connect: ' . mysql_error());
}
echo 'Connected successfully<br />';
$sql = 'DROP DATABASE TUTORIALS';
$retval = mysql_query( $sql, $conn );
if(! $retval )
{
  die('Could not delete database: ' . mysql_error());
}
echo "Database TUTORIALS deleted successfully\n";
mysql_close($conn);
?>
</body>
</html>

WARNING: While deleting a database using PHP script, it does not prompt you for any confirmation. So be careful while deleting a MySQL database.

Comments

Popular posts from this blog

In this chapter, we will see how to enable remote desktop application. It is important because this enables us to work remotely on the server. To do this, we have the following two options. For the first option, we have to follow the steps given below. Step 1 − Go to Start → right click “This PC” → Properties. Step 2 − On Left side click “Remote Setting”. Step 3 − Check radio button “Allow Remote connection to this computer” and Check box “Allow connection only from computers running Remote Desktop with Network Level Authentication (recommended)” → click “Select Users”. Step 4 − Click Add. Step 5 − Type user that you want to allow access. In my case, it is administrator → click OK. For the second option , we need to follow the steps given below. Step 1 − Click on “Server Manage” → Local Server → click on “Enable” or Disable, if it is Disabled.

The table creation command requires: Name of the table Names of fields Definitions for each field Syntax: Here is generic SQL syntax to create a MySQL table: CREATE TABLE table_name ( column_name column_type ); Now, we will create following table in TUTORIALS database. tutorials_tbl ( tutorial_id INT NOT NULL AUTO_INCREMENT , tutorial_title VARCHAR ( 100 ) NOT NULL , tutorial_author VARCHAR ( 40 ) NOT NULL , submission_date DATE , PRIMARY KEY ( tutorial_id ) ); Here few items need explanation: Field Attribute NOT NULL is being used because we do not want this field to be NULL. So if user will try to create a record with 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 primary key. You can use multiple columns separated by comma to define...

In this chapter, we will see how to configure WSUS and tune it. The following steps should be followed for configuring it. Step 1 − When you open it for the first time, you should do it by going to “Server Manager” → Tools → Windows Server Update Services, then a Configuration wizard will be opened and then click → Next. Step 2 − Click “Start Connecting” → Wait until the green bar is full and then → Next. Step 3 − Check the box for which the updates want to be taken, I did for English and then → Next. Step 4 − Check the box for all the products which you want to update. It is just for Microsoft products and it is recommended to include all the products related to Microsoft and then → Next. Step 5 − Choose the classification updated to be downloaded, if you have a very good internet speed, then check all the boxes, otherwise just check “Critical Updates”. Step 6 − Now we should schedule the updates which I will recommend to do it a...