private String buildDeleteSQL() {
    StringBuffer resultSQL = new StringBuffer();
    if (chkComment.getSelection()) resultSQL.append("/* Tadpole SQL Generator */"); // $NON-NLS-1$

    int cnt = 0;

    resultSQL.append("DELETE FROM  " + tableDAO.getSysName()); // $NON-NLS-1$
    for (ExtendTableColumnDAO allDao : (List<ExtendTableColumnDAO>) tableViewer.getInput()) {
      if ("PK".equals(allDao.getKey())) { // $NON-NLS-1$

        if (cnt == 0) resultSQL.append(" WHERE "); // $NON-NLS-1$
        else resultSQL.append("\t AND "); // $NON-NLS-1$

        resultSQL.append(allDao.getSysName()).append(" = ? "); // $NON-NLS-1$
        if (chkComment.getSelection()) {
          resultSQL.append("/* " + allDao.getType() + " */"); // $NON-NLS-1$ //$NON-NLS-2$
        }
        cnt++;
      }
    }

    return lastSQLGen(resultSQL.toString());
  }
  /**
   * Generate INSERT statement
   *
   * @return
   */
  private String buildInsertSQL() {
    StringBuffer resultSQL = new StringBuffer();
    if (chkComment.getSelection()) resultSQL.append("/* Tadpole SQL Generator */"); // $NON-NLS-1$

    int cnt = 0;

    resultSQL.append("INSERT INTO " + tableDAO.getSysName() + " ( "); // $NON-NLS-1$ //$NON-NLS-2$

    ExtendTableColumnDAO firstDao = (ExtendTableColumnDAO) tableViewer.getElementAt(0);
    if (firstDao.isCheck()) {
      for (ExtendTableColumnDAO allDao : (List<ExtendTableColumnDAO>) tableViewer.getInput()) {
        if ("*".equals(allDao.getField())) continue; // $NON-NLS-1$

        if (cnt > 0) resultSQL.append(", "); // $NON-NLS-1$
        resultSQL.append(allDao.getSysName());

        cnt++;
      }

    } else {

      for (ExtendTableColumnDAO allDao : (List<ExtendTableColumnDAO>) tableViewer.getInput()) {
        if (allDao.isCheck()) {
          if (cnt > 0) resultSQL.append(", "); // $NON-NLS-1$
          resultSQL.append(allDao.getSysName());

          cnt++;
        }
      }
    }
    resultSQL.append(
        ")" + PublicTadpoleDefine.LINE_SEPARATOR + " VALUES ( "); // $NON-NLS-1$ //$NON-NLS-2$
    cnt = 0;

    if (firstDao.isCheck()) {
      for (ExtendTableColumnDAO allDao : (List<ExtendTableColumnDAO>) tableViewer.getInput()) {
        if ("*".equals(allDao.getSysName())) continue; // $NON-NLS-1$

        if (cnt > 0) resultSQL.append(", "); // $NON-NLS-1$
        resultSQL.append("?"); // $NON-NLS-1$

        if (chkComment.getSelection()) {
          resultSQL.append(
              "/* "
                  + allDao.getField()
                  + ":"
                  + allDao.getType()
                  + " */"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
        }

        cnt++;
      }

    } else {

      for (ExtendTableColumnDAO allDao : (List<ExtendTableColumnDAO>) tableViewer.getInput()) {
        if (allDao.isCheck()) {
          if (cnt > 0) resultSQL.append(", "); // $NON-NLS-1$

          resultSQL.append("?"); // $NON-NLS-1$
          if (chkComment.getSelection()) {
            resultSQL.append(
                "/* "
                    + allDao.getField()
                    + ":"
                    + allDao.getType()
                    + " */"); //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$
          }
          cnt++;
        }
      }
    }

    resultSQL.append(")"); // $NON-NLS-1$

    return lastSQLGen(resultSQL.toString());
  }