Currency data type in MySQL: Decimal or Double?

Dear Experts,

I've been using MySQL for some time now, but I haven't really explored the more advanced features. Regarding field types for currency, when should I use a decimal and when should I use a double?

Thanks in advance!
LVL 5
jericotolentinoAsked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

Ivo StoykovCommented:
Hello jericotolentino,

DECIMAL is exact numeric data types storing up to 65.30 numbers. The maximum number of digits for DECIMAL is 65. The maximum number of supported decimals is 30.

DOUBLE is approximate numeric data types. A double floating-point number is accurate to approximately 15 decimal places.

HTH,

!i!
0
lahousdenCommented:
Usually when you are dealing with currency you will want to use DECIMAL. If you use DOUBLE you risk running into situations akin to those where people are sent bills for $0.00 (i.e. the database has stored a cumulated artihmetic result of, e.g., $0.00003267 or something and the program isn't aware it should write the tiny fraction off).
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
MySQL Server

From novice to tech pro — start learning today.