Java PreparedStatement retrieving last inserted ID [duplicate]

Answer 1

pass Statement.RETURN_GENERATED_KEYS in prepareStatement() along with your query. And then use getGeneratedKeys() of PreparedStatement to get the ResultSet containing your inserted auto_incremented_id.

String query="Insert INTO Table_A(name, age) (?, ?)";
                //String query="Insert INTO Table_A(name, age) ('abc','123' )";//Doesn't escape
                PreparedStatement prest;
                prest = con.prepareStatement(query, Statement.RETURN_GENERATED_KEYS);
                prest.setString(1,"abc");
                prest.setInt(2,123);
                prest.executeUpdate();
                //prest.executeUpdate(query, PreparedStatement.RETURN_GENERATED_KEYS); Throws an error
                //prest.executeQuery(); Throws an error
                ResultSet rs = prest.getGeneratedKeys();
                if(rs.next())
                {
                    int last_inserted_id = rs.getInt(1);
                }

Answer 2

If you can't use RETURN_GENERATED_KEYS, use another statement (a query this time) to do

SELECT last_insert_id()

Make sure that you definitely have an auto-increment primary key column in that table.

Answer 3

Use java.sql.ResultSet java.sql.Statement.getGeneratedKeys() to retrieve your generated keys.