What is the difference between varchar and varchar2?

What is the difference between varchar and varchar2?

What is the difference between varchar and varchar2?

Answer by Quassnoi for What is the difference between varchar and varchar2?

As for now, they are synonyms.

VARCHAR is reserved by Oracle to support distinction between NULL and empty string in future, as ANSI standard prescribes.

VARCHAR2 does not distinguish between a NULL and empty string, and never will.

If you rely on empty string and NULL being the same thing, you should use VARCHAR2.

Answer by Jovan for What is the difference between varchar and varchar2?

For now, they are exactly the same. It's a pre-reserved variable that may be used later in the future.

Answer by Brian for What is the difference between varchar and varchar2?

Currently VARCHAR behaves exactly the same as VARCHAR2. However, this type should not be used as it is reserved for future usage.

Taken from: Difference Between CHAR, VARCHAR, VARCHAR2

Answer by preethi ramasamy for What is the difference between varchar and varchar2?

1. VarChar can store only 2000 bytes but VarChar2 can store 4000 bytes
2. VarChar occupies space for null character and varchar2 will not occupy any space for null charcters

Answer by JOHN for What is the difference between varchar and varchar2?

CHAR is used to take exact size what you have given.

Example: CHAR(20)
The length of CHAR is 20 and you write only any char like 'ABC' then after 'ABC' spacing coming till 20.

Firstly VARCHAR store 2000 bytes approximately 2 KB (kilobytes) and occupy space as null values in any columns.

What VARCHAR2 store 4000 bytes approximately 4 KB (kilobytes) and doesn't occupy space as null values in any columns.

Answer by Nisar for What is the difference between varchar and varchar2?

VARCHAR2

is used to store variable length character strings. The string value's length will be stored on disk with the value itself.

variable x varchar2(10)  begin   :x := 'hullo';  end;  /  

VARCHAR

behaves exactly the same as VARCHAR2. However, this type should not be used as it is reserved for future usage

Answer by Deepak R for What is the difference between varchar and varchar2?

lets take an example and learn name varchar(10); this will consume 10 bites whether your name is 'Arun' or 'Amithraj' where as name varcahr2(10); this will consume only the number of bites which is actually needed. ex: 'Arun' only 4 bites,'Amithraj' only 8 bites.

Answer by Peter Parker for What is the difference between varchar and varchar2?

Difference:

• VARCHAR is ANSI standard but takes up space whereas VARCHAR2 is Oracle-only but makes more efficient use of space.
• VARCHAR can store up to 2000 bytes of characters while VARCHAR2 can store up to 4000 bytes of characters.
• If we declare datatype as VARCHAR then it will occupy space for NULL values, In case of VARCHAR2 datatype it will not occupy any space.

Similarity:

• VARCHAR and VARCHAR2 both are of variable character.

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