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Databases Interview Questions
Questions Answers Views Company eMail

what is the purpose of catlaog in oracle rman?

Value Labs,

2 5510

what is the difference between hot backup n rman backup?

Value Labs,

1 15413

how many outer joins are used in a single sql query? is there any limitations for using of outer joins?

BOB Technologies, Cap Gemini, IBM,

2 9326

How should i optimize the time for execution of stored procedure having single input and many output from the different tables?

1972

A lady is trying to pick gloves and hats from her wardrobe in the dark. She has 22 white and 33 green ones. She wants to pick a pair of gloves of white and green. How many tries before she gets it right?

TCS,

1 4562

1. what is the exact use of hint in sql. 2. How we can avoid index scan in sql even though index is there in the table.

Polaris,

1 6973

SQL Tuning, Oracle Server 10g: Why is the following hint invalid? SELECT /*+ first_rows parallel(table_name,paral_number)*/

Accenture,

1 10246

Magic Tables ?

Thomson Reuters,

2 6504

Diffrences between sql server 2000 vs 2005

Thomson Reuters,

2 5164

what is performance tunning in sql server ? explain.

Thomson Reuters,

1 4865

CTE(common table expression)

Thomson Reuters,

1 9107

how to find maximum identity number in a table ?

JPMorgan Chase, Thomson Reuters, Wipro,

2 13203

what is Covering Index ?

Thomson Reuters,

3 7421

How to create a view on a table which does not exists

Oracle, TCS,

4 21255

I have a package in which a table was used in a procedure and compiled later i have dropped the table used in the package what would be the status of package specification and body

TCS,

1 6555


Un-Answered Questions { Databases }

In how many ways you can invoke ssrs reports?

147


Explain the categories of stored procedure?

993


What is the xml datatype?

1134


What is a php database?

945


Write an sql query to select all records from the table?

1087


What is the maximum limit on the number of columns in a table?

1170


What does the not null constraint do?

1188


Does sybase support row level locking?

932


What is bulk copy or bcp in oracle?

1192


What is difference between stored procedures and application procedures?

1071


What are constraints in microsoft sql server?

1227


What is cursor in mysql?

949


What is the use of %rowtype?

1098


Are truncate and delete commands same? If so why?

1210


How to retrieve data from an explicit cursor?

1115