title: Update multiple rows in same query using PostgreSQL
body: <p>I'm looking to update multiple rows in PostgreSQL in one statement. Is there a way to do something like the following?</p>
  
  <pre><code>UPDATE table 
  SET 
   column_a = 1 where column_b = '123',
   column_a = 2 where column_b = '345'
  </code></pre>