title: Dax expression equivalent to ISNOTBLANK()
body: <p>I'm trying to create a PBI column in Dax than evaluates if a DateTime column is not blank. There currently is not an ISNOTBLANK() clause in Power BI so I can't outright reference that. </p>
  
  <p>However, since the column is in a DateTime format, I can't substitute <code>ISNOTTEXT()</code> or <code>ISNOTNUMBER()</code> as those create a parsing error. Using <code>||</code> as an OR evaluation instead if <code>&amp;&amp;</code> as an AND evaluation is not a usable solution either.</p>
  
  <p>I tried writing a statement like </p>
  
  <pre><code>DateFilter = IF(ISBLANK(Table[Date1]) &amp;&amp; ISBLANK(Table[Date2]), "BOTH BLANK", 
               IF(ISBLANK(Table[Date1]) &amp;&amp; Table[Date2]&lt;&gt;ISBLANK(Table[Date2]), "Date1 BLANK"
               IF(ISBLANK(Table[Date2]) &amp;&amp; Table[Date1]&lt;&gt;ISBLANK(Table[Date1]), "Date2 BLANK"
               IF( Table[Date1]&lt;&gt;ISBLANK(Table[Date1]) &amp;&amp; Table[Date2]&lt;&gt;ISBLANK(Table[Date2]), "NEITHER BLANK"
               ,"ERROR"))))
  </code></pre>
  
  <p>But using a scalar ISBLANK() clause is not possible in this format and throws a scalar error. Is there any way to write a Dax query that produces results equivalent to ISBLANK()?</p>