Answer Posted / jeyaprakash
primary is not allow null value.but unique can be allow null
value
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Hi Team, This is kartik, I recently completed my B-tech. Importance of posting this question is for to know the best books on SQL(MYSQL/Oracle)? I like SQL concept's so much, at the same time i decided to choose SQL for my career purpose. So please suggest me the best books that are very helpful for a fresher to improve concepts like (SQL/PLSQL)Basics, programming concepts, architectures etc. Please consider my request as an important one. I am very thankful to you for providing this opportunity. If possible can you please send the names of books for my personal id also: karthikgdv1206@yahoo.com. Thanks, Kartik T
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