Why do we use joins?
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using subquery how can i calculate working days in a month?
What is the difference between rename and alias?
What is data modelling in sql?
What is the difference between SQL Constraint and PL/SQL constraint.Pls give all the constraint name.
What is procedure in pl sql?
What is the difference between the repeatable read and serializable isolation levels? : Transact sql
Enlist the data types that can be used in pl/sql?
What is the difference between CHAR and VARCHAR2? If VARCHAR2 serves the uses of CHAR why CHAR is still used and not been discarded yet?
Explain ttitle and btitle.
can we use out parameter in a function?Give an example.
What is sql*loader and what is it used for? : aql loader
What are packages in pl sql and also explain its advantages?