I heard that MySQL is open source and it is free of charge [....] I wish to use as back end of database applications.
Do you realize that your inquiry is not much different from the classic "I want to photograph nature, and I heard that the Can-kon XYZ101 is on sale for $999; should I buy one?"
Such an inquiry omits
nearly all the information
that should inform sɛƖɛctıon
& purchase of a camera: How do you plan to use it [♢
]? How much of a load
, quantified as number of exposures made, do you reasonably expect to put on it each month? What's your level of skill
& relevant experience
Returning to your computational inquiry, your level of training
, plus relevant experience
matter quite a lot. What level of technical support
do you expect to need to keep your project on schedule, and to resolve later problems? As a "back end
applications", what query load
do you need it to handle gracefully [#
]? Do you reasonably expect that a single server
will suffice until after you retire from the project (or go to your final reward), or will you need to scale its thruput significantly upward, e.g., distribute processing over a network, incurring the complications of database-integrity
forgot: Who'll be paying
for development & maintenance of your project?
: E.g., keeping the proposed camera at home in a comfy temperature-controlled room, shooting activity at an outdoor bird-feeder thro' a large window; or tromping thro' forests or swamps with a tripod, stalking wildlife that's active mostly in typically, um, sloppy weather?
: Are there any occasions on which you should expect your database to get cruelly pounded, like the landline telephone system on Mothers' Day, or maybe Amazon on December 20--23?