What is data model in dbms?


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You loss one datafile and DB is running in ARCHIVELOG mode. You have full database backup of 1 week old and partial backup of this datafile which is just 1 day old. From which backup should you restore this file?

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Why is it better to use an Integrity Constraint to validate data ?

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How many database systems are there?

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What is the maximum line size that dbms_output can handle?

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What is rdbms with diagram?

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What do you mean by entity type?

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