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You don't specify what kinds of queries you're talking about or whether you are aware of / using the SQLContainer.
SQLContainer can only be used to display the results of SELECT queries. For any other kind of query, you can grab a connection from the SQLContainer's connection pool (that you create for it) and manually perform the query as you would do using plain JDBC. The book has a chapter on SQLContainer that describes how to use it.
If you're not using SQLContainer, you can use plain JDBC for any query.