What is the difference between varchar2 and varchar data type. Which among these two is having more advantage. What…

What is the difference between varchar2 and varchar data type. Which among these two is having more advantage. What…

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What is the difference between varchar2 and varchar data type. Which among these two is having more advantage. What is the difference between primary key constraint and unique constraint? What is the difference between varchar2 and number data type.

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1 VARCHAR2 vs VARCHAR VARCHAR2 is a data type commonly used in Oracle databases while VARCHAR is use
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