What are % TYPE and % ROWTYPE ? What are the advantages of using these over datatypes?

What are % TYPE and % ROWTYPE ? What are the advantages of using these over datatypes?
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1 Answer

Answer :

% TYPE provides the data type of a variable or a database column to
that variable.
% ROWTYPE provides the record type that represents a entire row of a
table or view or columns selected in the cursor.
The advantages are :
I. Need not know about variable's data type
ii. If the database definition of a column in a table changes, the data
type of a variable changes accordingly.
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