public static void insertItemDetailToTable(String urlInfoTableName, int step, String itemInfoTableName) {
		String sql = "select count(*) as num from " + urlInfoTableName;
		ClsDb cd = new ClsDb(true);
		ResultSet rs = cd.executeSelectQuery(sql);
		int sum = 0;
		try {
			rs.next();
			sum = rs.getInt("num");
	
			for (int i = 0; i < sum; i += step) {
				insertItemDetailToTableChild(urlInfoTableName, i, step, itemInfoTableName);
				ClsFile.writeLog("itemDetail.txt", "Ѿ" + (i + step));
			}
			rs.close();
			cd.closeDb();
		} catch (SQLException e) {
			e.printStackTrace();
		}
	}