subject: MySQL Database Design - Datatypes [print this page] MySQL Database Design - Datatypes MySQL Database Design - Datatypes
One of the primary advantages of working with MySQL is the ability to efficiently store and write a wide variety of data structures. Proper database design can ensure you get the best performance from your database with optimal security, speed, and efficiency. Out-of-the-box, MySQL provides a variety of tools and settings that allow you to optimize your database structure. This guide covers a basic overview to different ways you can conceptualize the database design process, opening up options to properly construct your data models for development.
Properly utilizing data structures
Each field should be designed using the most appropriate data type, utilizing pre-built functions such as DATE, INT and DECIMAL to find the ideal implementation for your own use. For example, the CHAR data type limits the storage slot to 255 characters, which can make computations more efficient and requires less storage capacity. At the same time, if you want to have a flexible data structure, you should utilize the TEXT datatype, which is not constrained to 255 characters and can allow for entry of larger "open field" forms as well. Taking a close look at database design can help you find the right solution going forward, with a full understanding of how different data types and structures impact database performance.
Designing example Field Types for Data Entry
Suppose you have a form that requires entry of a user's name, budget and project deadline. In this case the CHAR data type for the "name" field would be the most suitable, since it is a structured, alphabetical entry within the 255 character limit. The "budget" field should utilize the DECIMAL data type to for input of numbers with decimal digits. The important part is to pick the data type that limits potential values only to those entries that make logical sense for the field. You can further optimize the field entry to, say, DECIMAL(7, 2) to allow for seven total integers with 2 positions after the decimal place. For the "deadline" field, simply use a the DATETIME datatype, which allows for both date and time storage. The "comments" field can be of data type TEXT with unlimited character length.
How Dynamic Forms can Improve Site Experience
Database entry based upon forms does not have to be a static experience, since you can customize the site feedback back to the user "on the fly", based upon his or her data entries. For example, you can capture preferences and membership types, as well as segment a user's content contingent on their survey answers. Understanding the best ways to utilize site forms goes beyond just lead generation or user feedback, and can be used to enhance the overall site experience significantly for users.
Learning how to optimize a database and segment users properly has direct implications for improving your overall site experience, including the design of the database as well as segmentation of the data itself.
