i have a table eno dno sal 1 10 200 2 10 150 3 10 100 4 20 75 5 20 100 i want to get sal which is less than the avg sal of thri dept. eno dno sal 2 10 150 3 10 100 4 20 75

12 Answers   IBM,

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How does a trigger work?

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What is the main difference between a UNION statement and a UNION ALL statement? 1. A UNION statement eliminates duplicate rows; a UNION ALL statement includes duplicate rows. 2. A UNION statement can be used to combine any number of queries; a UNION ALL statement can be used to combine a maximum of two queries. 3. A UNION statement can only combine queries that have parallel fields in the SELECT list; a UNION ALL statement can combine queries with differing SELECT list structures. 4. A UNION statement cannot be used with aggregate functions; a UNION ALL statement can be used with aggregate functions. 5. There is no difference between the two statements; they are interchangeable.

2 Answers   Saman Bank, Sonata,

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Authentication mechanisms in Sql Server ?

1 Answers   BirlaSoft,

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What are the main features of cursor?

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Can 2 queries be executed simultaneously in a distributed database system?

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Which join condition can be specified using on clause?

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How many sql commands are there?

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check whether all the emp numbers are indeed unique.

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what are string data types? : Sql dba

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What is procedure explain with example?

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what are the advantages of using stored procedures? : Sql dba

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