title: Creating index on group of columns or separate index for each column, which is better?
body: <p>I've used <strong>Database engine tuning advisor</strong> to generate Index recommendations for <strong>multiple queries</strong> separately. After doing so i got separate recommendation for each query. As a result i noticed that the column used in one recommendation is used for another since the queries depends on the same table.</p>
  
  <p>Can i create one effective recommendation after running the multiple queries together?    </p>