What is the meaning of VARCHAR2?

What is the meaning of VARCHAR2?

VarChar/VarChar2 stands for Variable Character. 2. It is used to store character string of fixed length. It is used to store character string of variable length.

What is VARCHAR2 example?

To store variable-length character strings, you use the Oracle VARCHAR2 data type. A VARCHAR2 column can store a value that ranges from 1 to 4000 bytes. For example, if you define a VARCHAR2 column with a maximum size is 20. In a single-byte character set, you can store up to 20 characters.

What is VARCHAR2 limit?

The maximum length for VARCHAR2 is 32672 BYTE or 8168 CHAR which is the same as the maximum length for VARCHAR of 32672 OCTETS or 8168 CODEUNITS32.

What does VARCHAR2 10 mean?

VARCHAR2(10 char) could support as much as 40 bytes of information and will support to up 10 characters of data. Varchar2(10) uses the current value of NLS_LENGTH_SEMANTICS to determine the limit for the string. incase of byte, then it’s 10 bytes. incase of char, then it’s 10 characters.

Does VARCHAR2 take space?

As I know varchar2 is variable length datatype, so DB will only allocate space actually used by column, i.e. if column is only 10 character in Unicode it will allocate 10 bytes.

Can VARCHAR2 handle special characters?

Also known as Variable Character, it is an indeterminate length string data type. It can hold numbers, letters and special characters. Microsoft SQL Server 2008 (and above) can store up to 8000 characters as the maximum length of the string using varchar data type.

What is the difference between VARCHAR2 and VARCHAR2?

And to answer your next one: The difference between varchar2 and varchar : 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.

What is the use of varchar in Oracle?

VARCHAR Datatype. The VARCHAR datatype is an ANSI standard data type, which is why it is included in Oracle. However, at the moment, is the same as the VARCHAR2 data type. It was included in Oracle to allow for a distinction between NULL and empty strings, which is what VARCHAR should do, according to the ANSI standard.

How many bytes can a VARCHAR2 column hold?

By default, Oracle uses BYTE if you don’t explicitly specify BYTE or CHAR after the max_size. In other words, a VARCHAR2 (N) column can hold up to N bytes of characters. If you store a character string whose size exceeds the maximum size of of the VARCHAR2 column, Oracle issues an error.

What is the difference between Char and VARCHAR in MySQL?

CHAR does not need a size specified and has a default of 1. A size needs to be specified with VARCHAR/VARCHAR2 columns. CHAR will pad spaces to the right of strings to match the length of the column, while VARCHAR/VARCHAR2 does not. The performance of CHAR, VARCHAR, and VARCHAR2 is the same.