What are the set operators union, union all, minus & intersect meant to do?

941

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What is a nvl function? How can it be used?

961

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What is the use of aggregate functions in oracle?

982

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What do you mean by a database transaction & what all tcl statements are available in oracle?

934

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What is a data dictionary and how can it be created?

1060

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Why do we need integrity constraints in a database?

975

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What are the different responsibilities of a dba?

644

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How can we tune a sql query to optimize the performance of a database?

1

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What is a password file in a database and why is it required when a user can be authenticated using data dictionary tables?

1

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What is rac?

1

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What is table partitioning and why is it required?

1

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What is table partitioning?

1

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What is an explain plan and how does it help in optimizing the sql query?

1

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What is a recovery catalog?

1

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How is incremental backup different from differential backup?

1

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