So which database to choose that is free for massive web site?

Now that Oracle own MySQL and I'm not sure about the licensing.

开发者_运维问答

What options do I have for free database?

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If it's relational you want, perhaps PostgreSQL is your answer.

NoSQL offers several non-relational alternatives, depending on your requirements.

But if MySQL really is your cup of tea you should get someone to dig deeper into licensing for you and see if you can have peace of mind and keep MySQL. "I'm not sure" seems to be a poor reason to cast aside an investment in technology that you know well. Oracle's had MySQL for a while now. I'd recommend looking into it to figure it out one way or the other.

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there are too many DATABASES are available for free to use.

PostgreSQL
MySQL
BerkeleyDB
Firebird (database server) Etc..

Thanks.

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MariaDB is almost a drop-in replacement for MySQL.