Can a primary key contain more than one columns?
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How to convert the date format from dd/mm/yyyy to mm/dd/yyyy. (for eg). 22/05/2008 to 05/22/2008. when u use to_char(), it tells the month is invalid. how to resolve this problem.tel with eg.
Explain the use of record length option in exp command.
What is an Index ?
What is oracle host variable?
Why does oracle 9i treat an empty string as null?
What is the relation of a user account and a schema?
Explain alias?
What do you mean by group by clause?
Is oracle a relational database?
What is COST-based approach to optimization ?
What is the effect of setting the value "ALL_ROWS" for OPTIMIZER_GOAL parameter of the ALTER SESSION command ?
Why is oracle database so popular?