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?

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In which table collections errors are stored.

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what is difference between primary key and unique key ?

2 Answers  

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Explain about normal forms?

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Write short notes on manual refreshes.

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Pgm A calls Pgm B and pgm B uses cursor, when pgm B is called second time, the program is abending saying the cursor is opened? Why?

0 Answers   IBM,

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What is normalization? Explain different levels of normalization?

8 Answers   CG-VAK, Choice Solutions, College School Exams Tests, IBM, Wipro,

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A) Which two are benefits of Teradata's support for ANSI Standard SQL? (Choose two.) 1.data is distributed automatically 2.queries get optimized to better plans 3.submit queries from other database systems 4.can interface with BI tools B) Which statement is true when comparing the advantages of third normal form to star schema? 1.Star schema tends to have fewer entities. 2.Star schema requires additional data storage. 3.Third normal form tends to have fewer entities. 4.Third normal form requires additional data storage. C)Which two sets of functions does the Parsing Engine (PE) perform? (Select two.) 1.sorting, formatting, and aggregating of the final answer set 2.flow control of the data to and from the participating tables 3.SQL statement interpretation, syntax validation, and semantic evaluation 4.dispatching the step execution sequence to the AMP via the BYNET D) Which two can be achieved with Teradata Active System Management (TASM)? (Choose two.) 1.disable hardware 2.react to hardware failure 3.influence response times 4.collect metadata E) Which three mechanisms can be used to ensure security within the Teradata Database? (Choose three.) 1.views 2.spool limits 3.roles 4.access rights 5.profiles

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How do you implement one-to-one, one-to-many and many-to- many relationships while designing tables?

1 Answers   Flextronics, Hexaware, SQL Star,

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what is the use of foreginkey

2 Answers  

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explain detail about ftp in datastage?

0 Answers   IBM,

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What is DB Development software?

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