I am a student of IT student , I want to be a Data base administrator in future or you can say a DBA , yes I know that it is a very difficult task if all your database concepts, SQL or Oracle Concepts are not clear , so I want to do this subject thorough and clear each and every doubt, so after taking my friends advice I am posting my question in this forum, I wanted to ask that are the null value concept equal to an empty value.
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