/// 查询总数
 /// <summary>
 /// 查询总数
 /// </summary>
 /// <param name="sql"></param>
 /// <returns></returns>
 public int GetDataTableCount(string sql)
 {
     using (OracleDataBase db = new OracleDataBase())
     {
         return(db.ExecuteDataTableCount(sql, null));
     }
 }