如何在android上只插入一次sql查询

我只需要一次插入sql查询的

表

在插入查询之前。如果我的
A
表有1条记录。执行更新1记录

我的
A
表有0条记录。插入查询

public class compareInsert extends Thread {

    private Connection mConnection = null;
    private Statement mStatement = null;

    @Override
    public void run() {
       super.run();

       Looper.prepare();
       setDB();
       Looper.loop();
    } 

    public void setDB() {
          mConnection = DBconnect.connectJDBC(); // DB Connect.

          try {
              mStatement = mConnection.createStatement();
              mStatement.executeQuery("use be");

              String insertq = "insert into A"
                       + "(name, old, num)"
                       + "values"
                       + "(?, ?, ?);
             PreparedStatement statement = mConnect.prepareStatement(insertq);
             statement.setString(1, "hyunwook");
             statement.setString(2, "17");
             statement.setString(3, "2732");

             int ret = statement.executeUpdate();
             if (ret > 0) {
                Log.d(TAG, "SUCCESS");
             } else {
                Log.d(TAG, "failed");
             }
          } catch (Exception e) {
               e.printStackTrace();
          } finally {
               try {
                    mConnection.close();
               } catch (Exception e) {
               }
          }
      }
   }

我只知道使用插入查询

public class compareInsert extends Thread {

    private Connection mConnection = null;
    private Statement mStatement = null;

    @Override
    public void run() {
       super.run();

       Looper.prepare();
       setDB();
       Looper.loop();
    } 

    public void setDB() {
          mConnection = DBconnect.connectJDBC(); // DB Connect.

          try {
              mStatement = mConnection.createStatement();
              mStatement.executeQuery("use be");

              String insertq = "insert into A"
                       + "(name, old, num)"
                       + "values"
                       + "(?, ?, ?);
             PreparedStatement statement = mConnect.prepareStatement(insertq);
             statement.setString(1, "hyunwook");
             statement.setString(2, "17");
             statement.setString(3, "2732");

             int ret = statement.executeUpdate();
             if (ret > 0) {
                Log.d(TAG, "SUCCESS");
             } else {
                Log.d(TAG, "failed");
             }
          } catch (Exception e) {
               e.printStackTrace();
          } finally {
               try {
                    mConnection.close();
               } catch (Exception e) {
               }
          }
      }
   }

此源代码是插入查询代码。
但应用程序启动时，始终插入查询

public class compareInsert extends Thread {

    private Connection mConnection = null;
    private Statement mStatement = null;

    @Override
    public void run() {
       super.run();

       Looper.prepare();
       setDB();
       Looper.loop();
    } 

    public void setDB() {
          mConnection = DBconnect.connectJDBC(); // DB Connect.

          try {
              mStatement = mConnection.createStatement();
              mStatement.executeQuery("use be");

              String insertq = "insert into A"
                       + "(name, old, num)"
                       + "values"
                       + "(?, ?, ?);
             PreparedStatement statement = mConnect.prepareStatement(insertq);
             statement.setString(1, "hyunwook");
             statement.setString(2, "17");
             statement.setString(3, "2732");

             int ret = statement.executeUpdate();
             if (ret > 0) {
                Log.d(TAG, "SUCCESS");
             } else {
                Log.d(TAG, "failed");
             }
          } catch (Exception e) {
               e.printStackTrace();
          } finally {
               try {
                    mConnection.close();
               } catch (Exception e) {
               }
          }
      }
   }

请帮我

谢谢。
使用插入或替换查询并在表中添加iD类型列，这将帮助您实现您的请求。使用插入或替换查询并在表中添加iD类型列，这将帮助您实现您的请求。