Explain about a primary key?

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Explain the role of indexing in databases?

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What is denormalization and when would you go for it?

9 Answers   NBP,

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What are defaults? Is there a column to which a default can't be bound?

2 Answers  

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explain detail about ftp in datastage?

0 Answers   IBM,

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Which four data types cannot be used as a return type from a user-defined function?

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Explain about the storage and physical database design?

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

2 Answers  

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What are the three basic rules which are to be followed for the relational model of the database?

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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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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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How long can an error message be in raiseerror function?

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