tinyint

I was designing a database for a site where I need to use a boolean datetype to store only 2 states, true or false. I am using MySQL. While designing the database using phpMyAdmin, I found that I have both the BOOLEAN datatype and the TINYINT datatype. I went through different articles, some said TINYINT is the same as BOOLEAN, no difference. Some say BOOLEAN is converted into TINYINT in MySQL. MY question is, if they both are same why do there exist two? There should be only one of them. Here is the reference to the articles I read: http://www.careerride.com/MySQL-BOOL-TINYINT-BIT.aspx http:/

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 for not in stock. I am getting feeds from vendors, so I thought to myself, "What if they pass how many are instock?" So I wondered if I inserted a number higher than 1 what would happen. I assumed it would default to 1. To my surprise it will allow me to hold any number up to 127, anything over defaults to 127. Can anyone explain why? The signed TINYINT data type can store integer values between -128 and 127. However, TINYINT(1) does not change

I want to limit the datatype value that can be stored within a field to a specific range of integer values: [0,10]. On user input within a PHP script I validate and sanitise the data to make sure it is within the range 0 to 10. However, is there a way to ensure this remains true within the votes table itself via some sort of datatype or constraint? At the moment I store the int value within an UNSIGNED TINYINT which of course has the range of 0-255. I am aware of ENUM as an option. However, I have read that it is not advisable when using numbers: http://komlenic.com/244/8-reasons-why-mysqls

In which cases would you use which? Is there much of a difference? Which I typically used by persistence engines to store booleans? A TINYINT is an 8-bit integer value, a BIT field can store between 1 bit, BIT(1), and 64 bits, BIT(64). For a boolean values, BIT(1) is pretty common. Nelson Miranda From Overview of Numeric Types ; BIT[(M)] A bit-field type. M indicates the number of bits per value, from 1 to 64. The default is 1 if M is omitted. This data type was added in MySQL 5.0.3 for MyISAM, and extended in 5.0.5 to MEMORY, InnoDB, BDB, and NDBCLUSTER. Before 5.0.3, BIT is a synonym for