All matter is made of atoms. Atoms are the smallest particle of matter. They are so small that you cannot see them with your eyes or even with a standard microscope. A standard sheet of paper is about a million atoms thick.
Answer Wiki. The int type is a 4-byte signed integer. There are also tinyint (1 byte), smallint (2 bytes), and bigint (8 bytes), and unsigned versions of all of these. As Apostolos mentioned, the docs for all the numeric types are here: http://dev.mysql.com/doc/refman/...
1 First, we convert the MySQL String Length string into ucs2 character set, which is UCS-2 Unicode that holds 2-byte characters.  Second, we use the CHAR_LENGTH and LENGTH functions to get the length of the @s string in bytes and in characters.