When should I use UNSIGNED and SIGNED INT in MySQL?

Question

When should I use UNSIGNED and SIGNED INT in MySQL ? What is better to use or this is just personal prefernce ? Because I\'ve seen it used like this;

id INT         


        

Answer 1

One thing i would like to add In a signed int, which is the default value in mysql , 1 bit will be used to represent sign. -1 for negative and 0 for positive. So if your application insert only positive value it should better specify unsigned.