Java tutorial
import java.sql.Connection; import java.sql.DriverManager; import java.sql.ResultSet; import java.sql.ResultSetMetaData; import java.sql.SQLWarning; import java.sql.Statement; public class Main { public static void main(String[] args) throws Exception { Connection conn = getHSQLConnection(); conn.setAutoCommit(false); Statement st = conn.createStatement(); st.executeUpdate("create table survey (id int,name varchar(30));"); st.executeUpdate("insert into survey (id,name ) values (1,'nameValue')"); st = conn.createStatement(); ResultSet rs = st.executeQuery("SELECT * FROM survey"); outputResultSet(rs); checkForWarning(rs.getWarnings()); rs.close(); st.close(); conn.close(); } static boolean checkForWarning(SQLWarning w) { if (w == null) { return false; } do { System.err.println("Warning:\nMessage: " + w.getMessage()); System.err.println("SQL state: " + w.getSQLState()); System.err.println("Vendor code: " + w.getErrorCode() + "\n----------------"); } while ((w = w.getNextWarning()) != null); return true; } private static void outputResultSet(ResultSet rs) throws Exception { ResultSetMetaData rsMetaData = rs.getMetaData(); int numberOfColumns = rsMetaData.getColumnCount(); for (int i = 1; i < numberOfColumns + 1; i++) { String columnName = rsMetaData.getColumnName(i); System.out.print(columnName + " "); } System.out.println(); System.out.println("----------------------"); while (rs.next()) { for (int i = 1; i < numberOfColumns + 1; i++) { System.out.print(rs.getString(i) + " "); } System.out.println(); } } private static Connection getHSQLConnection() throws Exception { Class.forName("org.hsqldb.jdbcDriver"); String url = "jdbc:hsqldb:mem:data/tutorial"; return DriverManager.getConnection(url, "sa", ""); } }