Difference between “int” and “int(2)” data types in my sql

Question

Just I wonder why the range is given with the my sql data types. I define a table with a field name \"id\" and the data type is \"int(2)\". I inserted the value to the field

Answer 1

The (2) doesn't define the size of the integer. It's just number of digits to display in some tools - I'm not sure of the details. The size of an integer is determined by whether it's INT, TINYINT, SMALLINT, MEDIUMINT, or BIGINT.