title: ssis dynamic connection string variables
body: <p>I am having collection SSIS packages created by someone.Example shown below
  <img src="https://i.stack.imgur.com/s0Hvl.jpg" alt="enter image description here"></p>
  
  <p>In Each and every package they created Variables.Inside my project folder I can able to find Democonnectionstring</p>
  
  <p><img src="https://i.stack.imgur.com/mBDaZ.jpg" alt="enter image description here"></p>
  
  <p>Inside the Democonnectionstring
  <img src="https://i.stack.imgur.com/mxzr2.jpg" alt="enter image description here"> </p>
  
  <p>What my question is why they are using Variables and DemoConnectionString and if I want to change my Servername and Password where I should change.Any one explain me in detail.</p>