Different between primary key and unique key? 

One table may have more than one Unique Key Constraint
columns, but should have only one Primary Key Constraint
column.
 
Unique key allow us NULL values where Primary key not allow us null values. 
 
 

Most Popular

The difference between React vs AngularJs

Image
React and AngularJs are currently using Travel and News companies. Main reason difference between AngularJs and ReactJs is AngularJS 1. AngularJs is MVC framework library. It is used for Two-way data binding. 2. AngularJs is an App development framework. ReactJS 1. React Js is a Library. It is used for One-way data binding. 2. ReactJs is an interface development framework. AngualrJs is a Javascript Framework. Where we can add HTML tags with Scrip tag. It is a Library written in Javascript. AngularJs developed by GOOGLE. AngularJs similar to Backbone or JavascriptMVC. It is a complete solution for rapid development. Following are some Features of AngularJs. 1. REST Easy: RESTful action quick communication between server to the client. 2. Extends HTML: AngularJS extends HTML with ng-directives. The ng-app directive defines an AngularJS application. The ng-model directive binds the value of HTML controls (input, select, textarea) to application data. The ng-bi...
Keep reading

How to send emails using PHPmailer and GMAIL SMTP

Image
Here I have tried how to send PHPMailer with attachement using SMTP configuration. For SMTP Configuration we here used GMAIL Auth. You can used any Auth like SMTP2GO , SendGrid . Download PHPMailer library. PHPMailer Sample Code Addd or Copy paste the following code in your editor and save with any filename with extension ".php" and try in your live server or local server. But Make sure you have to connect with internet with proper Auth details <?php require_once('phpmailer/PHPMailerAutoload.php'); $mail = new PHPMailer(); $mail->CharSet = "utf-8"; $mail->IsSMTP(); // Set mailer to use SMTP $mail->SMTPDebug = 1; // Enable verbose debug output $mail->SMTPAuth = true; // Enable SMTP authentication $mail->Username = "xxx@example.com"; //Your Auth Email ID $mail->Password = "xxxxxx"; //Your Password $mail->SMTPSecure = 'tls'; // Enable TLS encryption, `ssl` also accepted $mail->Host = "...
Keep reading

Enabling Gzip Compression of PHP, CSS, and JS Files Without mod_deflate

For enable Gzip compression using mod_deflate add following lines to your .htaccess file AddOutputFilterByType DEFLATE text/html text/plain text/xml text/css text/javascript application/javascript application/x-javascript But those who don’t allow the mod_deflate module and run PHP in CGI/FastCGI mode you can’t go with the easy method. So, to serve up your PHP, CSS, and JS files you can try the following method. Step 1: PHP Configuration Add or modify the following lines in your custom php.ini file output_handler = Off zlib.output_compression = On zlib.output_handler = ob_gzhandler Now this will take care of gzipping all PHP files. Step 2: .htaccess Configuration Add the following lines to the bottom of a .htaccess file in the root of your website. RewriteEngine On RewriteRule ^(.*\.js) gzip.php?type=js&file=$1 RewriteRule ^(.*\.css) gzip.php?type=css&file=$1 This will redirect all css and js requests files through gzip.p...
Keep reading