What is data modelling explain?
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What is rdbms table?
What does you mean by s4 super key?
What is pdo database?
What do you understand by unique key?
Can A column defined as PRIMARY KEY can have NULL values ?
Describe and contrast sql and qbe.
Which database is best for large data?
Explain all codd's rules for relational database system?
What are the main differences between primary key and unique key?
What are the benefits of modeling?
What are the types of database lock?
What do you understand by proactive, retroactive and simultaneous update?
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