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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How to use timestamp datatypes

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What is data modeling with example?

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What is the physical representation for a many-to-many relationship?

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

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Who are end users in dbms?

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Explain about relational database management systems?

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You have a table with three columns: amount1, amount2, and amount3 in a single row only one of these three columns will have a value and the other two will be null. Write a sql query to retrieve the values from these columns?

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

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If a column is an image value type, how you can compare column values? How can you use this column in join clause?

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Given an employee table, how would you find out the second highest salary?

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Explain the role of indexing in databases?

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