Do I need to buy a MySQL DB server license for a facebook game [closed]

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Maybe this is a duplicate question with this (is mysql license needed for sites like facebook,twitter) but I still want anyone who have experience on this to explain.

Here is my current situation, I wrote a game(PHP+MySQL), I want to moneitize by ads or the user buy the item with fb credit, so, what I understand is, if I don't share my code(...what code?), then I need to buy a license from MySQL AB, but do I really need to buy license? Anyone have experience on this? Please share, thanks a lot~!

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I believe the only time you need to buy a license is if you want to distribute MySQL with your application (sort of like an embedded server).

Though, I would imagine sites like Facebook and Twitter purchased something completely different which is the "enterprise version", which also gets them support.

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Short answer: nope, Long answer: nope

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As you are just using the MySQL binaries as provided, your not obliged to publish any code (You're not making any changes in MySQL sourcecode, do you).

As stated by @Nathan Adams you don't need a commerical licence if you don't want to resell an application with MySQL embedded.