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JAVA - How do I keep data stored into a internal DB (running SQL if possible)

My problem is that I don't even know what I am looking for ... I created an app that should save data even without an internet connection and than update it into a External Server running SQL.I need to have my application to store the data into the pc itself

How do I accomplih that? What am I looking for? Derby?

在您的代码中,使用static final String DB_CONNECTION = "jdbc:mysql://127.0.0.1/dataBasename

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