MySQL Boolean “tinyint(1)” holds values up to 127?

Question

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

Answer 1

The tinyint data type utilizes 1 byte of storage. 256 possible integer values can be stored using 1 byte (-128 through 127). if you define as tinyint unsigned then negative values are discarded so is possible to store (0 through 255).