title: SQL - Compare two sets
body: <p>Lets say, I have employees, and I know what fruits they like.</p>
  
  <pre><code>fruits(name, fruit_name)
  </code></pre>
  
  <p>My question is: list all the employees which at least like the same fruits as Donald.</p>
  
  <p>So how do I compare two set of values?</p>
  
  <p>This is how I get the fruits which Donald likes:</p>
  
  <pre><code>Select name, fruit_name
  from fruits
  where initcap(name) like '%Donald%';
  </code></pre>
  
  <p>Example: Donald likes apples, pears, peaches. I need the people who like apples, pears, peaches and possibly other fruits, but they must like those 3.</p>