title: making specific value as default in a parameter ssrs(rdl)
body: <p>iam using visual studio 2017 and make an rdl report</p>
  
  <p>and i have a  parameter (drop down)that takes it's values from the query</p>
  
  <pre><code>select column1 from table1 
  </code></pre>
  
  <p>suppose that there are five elements A,B,C,D,E in column1 of table1  </p>
  
  <p>how to  set first value which appears form available values 
  to be selected as default in order to not obligate the user to select a value </p>
  
  <p>i mean i don't want to see the phrase    instead i want first value to be selected </p>