Answer / manoj

select employee_id, count(*) from employees group by
employee_id having count(*) > 1

Answer / avik ganguly

select * from emp a where rowid = (select max(rowid) from
emp where empno = a.empno group by empno having count(*) >1)

Explain the role of indexing in databases?

0 Answers  

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Explain the process of the user request and data generating?

0 Answers  

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Write the difference between case version and decode version.

2 Answers  

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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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What are data modelling techniques?

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

0 Answers  

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On friday, you issued several insert statements using query analyzer. You then verified the data had been correctly entered with a select statement on monday, your users report that the data is not there what happened?

0 Answers  

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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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What are the key features of dbms?

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

0 Answers  

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Write short notes on XSU and JAVA

1 Answers  

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Explain the cube operator?

0 Answers  

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