1
我想使用準備好的語句將值插入到現有記錄中。該記錄的值是插入的最後一條記錄,我試過LAST
函數和MAX
,但它似乎沒有工作,我也嘗試SELECT
表示INSERT
內沒有運氣。在現有記錄中插入值。使用準備好的語句的sqlite
public static void insertCoordinates(){
java.sql.Connection c = null;
try {
String str1 = Singelton.getInstance().getTxtField1().getText();
Class.forName("org.sqlite.JDBC");
c = DriverManager.getConnection("jdbc:sqlite:timeline_DB.db");
c.setAutoCommit(false);
PreparedStatement preparedStatement = c.prepareStatement("insert into event_table(bar_length, x_bar, y_bar) values (?, ?, ?) WHERE event_title =?");
preparedStatement.setInt(1, CanvasNewTimeLine.Event_length);
preparedStatement.setInt(2, CanvasNewTimeLine.x);
preparedStatement.setInt(3, CanvasNewTimeLine.H_LINE);
preparedStatement.setString(4,str1);
preparedStatement.executeUpdate();
c.commit();
c.close();
} catch (Exception e) {
System.err.println(e.getClass().getName() + ": " + e.getMessage());
System.exit(0);
System.err.println("problem");
}
System.out.println("yesssssss successfully");
}