How is data stored in dbms?

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What is the difference between a primary index and a secondary index? What is a duplicate data entry in an index? Can a primary index contain duplicates?

5 Answers   IBM,

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Explain the general syntax for a SELECT statements covering all the options.

3 Answers  

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How to create an external table.

1 Answers  

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You have two tables with a one to many join based on a field named id. You need to find records in the parent table that are not represented in the child table. how would you accomplish this?

0 Answers  

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You are testing the performance of a query the first time you run the query, the performance is slow. the second time you run the query, the performance is fast. why is this?

0 Answers  

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What are the three types of database design?

0 Answers  

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Explain the rollup operator?

0 Answers  

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Hi , any one can help me on the same,this is regarding the Informatica Function doc,i want to know how developer is will develop the mapping. pl forwar the any function doc .just for my references. svlc75@yahoo.co.in

0 Answers   Covansys,

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When installing the datastage7.5x2 edtion iam getting aproblem i.e the cpu count is 2 but the cpu count in installation is one . how can i install in my p.c (system is dual core).

0 Answers  

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how will I find the duplicate rows count from employees tablein oracle.

2 Answers  

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Write the difference between case version and decode version.

2 Answers  

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