When we can declare a column as Unique and Not Null both at the same time. What is the use pf Primary Key then?

2 Answers   Accenture, Unisoft Infotech,

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diff b/w function and procedure?

9 Answers   iFlex,

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What is the difference between cross join and natural join?

0 Answers  

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What are Lexical Parameters.How They are used in Reports 6i

2 Answers   eicc,

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what is the difference between varray and table data type..please expalain with some examples... under what situation you will go for varray..instead of index by table...

1 Answers   HCL, Satyam,

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how to convert character strings to numeric values? : Sql dba

0 Answers  

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What is the starting oracle error number?

0 Answers  

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write an sql query to find names of employee start with 'a'? : Sql dba

0 Answers  

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What is pl sql block in dbms?

0 Answers  

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What is difference between inner join and cross join?

0 Answers  

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what are pl/sql collections?

4 Answers   JPMorgan Chase, Oracle,

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How will you make performance better for application including front end and back

2 Answers   Metric Stream,

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