How to filter out duplications in the returning rows using oracle?
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What is oracle server autotrace in oracle?
find out the second highest salary?
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What is an Extent ?
What is the sql query to concatenate column values from multiple rows in oracle?
what is index?
How to use null as conditions in oracle?
difference between truncate and delete ,drop?
Whatz the main diff between Subquery and a Join
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