title: Sequelize upsert when using sql server
body: <p>can somebody tell me if a sequelize upsert works in sql server? I'm using, specifically, sql server version 2012. </p>
  
  <p>I'm confused because, in the sequelize docs, they state <strong><em>implementation details</em></strong> for: </p>
  
  <p>MySQL, PostgresSQL and SQLite, but not include sql server in the list. </p>
  
  <p>So, I'm curious if it is posible to do an upsert when using sql server (2012). </p>