what is sql? : Sql dba

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Does group by remove duplicates?

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Is hadoop a nosql?

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Give which cursor is better for better performance means type of cursors?

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What is the plv (pl/vision) package offers?

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What is the maximum number of triggers, you can apply on a single table?

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What is normalisation in sql?

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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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What is PL/SQL Records?

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Write a pl/sql script to display the following series of numbers: 99,96,93……9,6,3?

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Describe the Index, Types of index, At what situation we have used? Which one s better than others?

1 Answers   IBM, TCS,

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Whis is not false in primary key?

0 Answers   Fintellix,

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