I wanted to make a true/false field for if an item is in stock.
I wanted to set it to Boolean ( which gets converted to tinyint(1) ), 1 for in stock, 0
tinyint(1)
The signed TINYINT data type can store integer values between -128 and 127.
TINYINT
However, TINYINT(1) does not change the minimum or maximum value it can store. It just says to display only one digit when values of that type are printed as output.
TINYINT(1)