title: When to use separate SQL databases on the same server?
body: <p>I've worked in several SQL environments.  In one environment, the different tables holding business data were split across several different SQL databases, all on the same server.</p>
  
  <p>In another environment, almost all the tables are kept on one single SQL database.</p>
  
  <p>I'm creating a new project that is closely related to another project, and I've been wondering if I should put the new tables in the same SQL database or a new SQL database.</p>
  
  <p>This all runs on MS SQL Server.</p>
  
  <p>What factors do I need to consider as I make this decision?</p>