Answer / swapnil

When you use varchar data type say varchar(20),
it will reserve the space of 20 bytes even length of
passing parameter is less than 20 byte. But in varchar2, it
will release the remaining space after reserving actual
passing parameter length

Answer / srinivasa reddy k

Varchar2 is the oracle datatype
Varchar is not the oracle datatype but still oracle
supports it by converting it into varchar2

But it is not a good practice to use Varchar datatype

Answer / sandeep kumar

VARCHAR2 is as per the ANSI standard while VARCHAR is not.
Hence we should use VARCHAR2.

Answer / mohan kumar

VARCHAR--FIXED LENGTH OF DATA TYPE,MEMORY ALLOCATION WILL
NOT TAKE PLACE.
VARCHAR2--IN THIS ORACLE DATA TYPE,MEMORY ALLOCATION WILL HAPPEN

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