What Are Not Null Constraints? A Video Quiz

[@pritamswarupajena1194]

Yesterday my query was running fine. Today it is executing long time what could be possible reason? Kindly answer where can we start diagnosing?

[@TheMagicofSQL]

Start by looking at the execution plan & comparing it to the previous one (if available). The following playlist shows you how to get started with the plan in SQL Developer kzbin.info/www/bejne/iXmZoKZqr92pna8