<h3>Author:</h3>Hacker News<br><br><center>https://modern-sql.com/concept/three-valued-logic/og-sm-concept-three-valued-logic-compatibility.xeJddttw.png<br></center><p>Making decision despite missing SQL data (NULL): How to avoid OR…IS NULL in the WHERE clause.</p><h1><center>[Source](http://modern-sql.com/concept/three-valued-logic)<br><hr>Follow me for more news</center></h1>
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