Answer Posted / varun

select sal from emp where rownum=2 order by sal desc;

What is pl/sql table? Why is it used?

1035

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What is sql trigger example?

1053

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What is a sql driver?

995

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Why do we use cursors?

984

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What are the different types of a subquery?

1044

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What is the primary use of normalization?

1000

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How can a function retun more than one value in oracle with proper example?

1073

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What is the difference between clustered and non-clustered indexes?

1085

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What is the use of double ampersand (&&) in sql queries? Give an example

1139

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How to install oracle sql developer?

1042

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What is the current version of postgresql?

1060

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What is data definition language?

1088

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What is an exception in pl/sql?

1084

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What are the events on which a database trigger can be based?

1180

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Does pdo prevent sql injection?

931

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