title: SQL Server Inline CASE WHEN ISNULL and multiple checks
body: <p>I have a column with some nulls. If that column is null, I want to condition output for it based on values in another column.</p>
  
  <p>So <code>if case when null (if c=80 then 'planb'; else if c=90 then 'planc')</code></p>
  
  <p>How would you code that in an inline T-SQL statement?</p>
  
  <p>thanks.</p>