What is a sub query? Describe its types?
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What are the differences between primary key and unique key?
I have a parent program and a child program. I want to write a statement in Exception Block of the parent program so that when the statement in the exception block is executed, the control goes to the next statement in the parent block bypassing the child block.How do i do that?
List the parts of a database trigger.
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what is candidate key & super key
What happens if you use a wrong connect identifier?
Which environment variables are absolutely critical in order to run the OUI?
why can't we assign not null constraint as table level constraint
Explain the use of record length option in exp command.
What is clusters ?
How to initialize variables with default values?
how to delete all duplicate records from a table using subquery?