What kind of database is suitable for javascript

I would like to use a database in my game but I don’t know surely what is the best for
javascript codes. Playerprefs are not suitables. I tried SQlite but it did not work properly. I have Unity 4.01 is there a built-in database or other kind of solution?

There is not a built in database. The database you use depends on what platform you want to target. SQLite is a good choice.