how mysql optimizes distinct? : Sql dba

0 Answers  

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HOW TO TUNE ORACLE SQL QUERIES GIVE ME STEP BY SREP

1 Answers   TCS,

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Is a foreign key always unique?

0 Answers  

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What is difference between sql and mysql?

0 Answers  

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What is a self join ?

6 Answers   BirlaSoft,

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Define SQL and state the differences between SQL and other conventional programming Languages?

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What is an inconsistent dependency?

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when a procedure /package is getting invalidated?

4 Answers   TCS,

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7. Where would you look for errors from the database design?

1 Answers   Fintellix,

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What are the features of pl sql?

0 Answers  

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source destination distance chennai bangalore 500 bangalore chennai 500 hyd delhi 1000 delhi hyd 1000 bangalore hyd 800 Here chennai to bangalore and bangalore to chennai is same distance. and hyd and delhi also same criteria. Based on the distance i want to display only one row using sql query?

4 Answers   JPMorgan Chase,

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how can we destroy the session, how can we unset the variable of a session? : Sql dba

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