Question

I have created this table:

create table t(amount int(5));

and I have tried to insert these values:

insert into t values
  (1),
  (11),
  (111),
  (1111),
  (11111),
  (111111),
  (11111111);

Why does the table accepts all the above values instead of the giving ERROR ?
Is there any solution for this problem ?

Answer 1

Int is always four bytes wide.

In the case of int(5) means display-width is 5

To see its working use following query to create table

CREATE TABLE `t` (
    `amount` INT(5) ZEROFILL NULL DEFAULT NULL
)

and insert number 20 .

Then if you try to run select * from t you will get following