Oracle 常用

Get MAX Update_timestamp SQL

SELECT to_char(MAX(update_timestamp), 'yyyymmddhh24miss.sssss') lastUpadateTime 
FROM t_itemorder 
WHERE itemorder_num = '184'

return : 20060123164734.60454

SELECT to_char(SYSDATE, 'yyyy/mm/dd HH24:MI:SS') FROM dual

return : 2006/03/01 10:33:17

Get MAX Update_timestamp Method

        public static string QueryLastUpadateTime(int stockCorrectNum)
        {
            StringBuilder sb = new StringBuilder();
            sb.Append("SELECT MAX(update_timestamp) lastUpadateTime FROM t_stockCorrect ");
            sb.AppendFormat("WHERE stockCorrect_num = {0}", stockCorrectNum);

            string sql = sb.ToString();
            object obj = OracleHelper.ExecuteScalar(sql);

            if (obj == DBNull.Value)
            {
                return "";
            }
            
            return ((DateTime)obj).ToString(BaseRecord.TimeFormat);
        }

return : 20060123164734000
另：

 public class BaseRecord
 {
        private static readonly ILog log = LogManager.GetLogger(typeof(BaseRecord));
        
        public static readonly int        NullNumber          = int.MinValue;

        public static readonly string    IntegerFormat    = "#,##0";
        public static readonly string    DecimalFormat   = "#,##0.00";
        public static readonly string    DateFormat         = "yyyyMMdd";
        public static readonly string    TimeFormat         = "yyyyMMddHHmmssfff";
}

在 DataGrid 中的 DataFormatString 属性

<asp:BoundColumn HeaderText="UpdateTime" DataField="UpdateTime" DataFormatString="{0:yyyy-MM-dd hh:mm:ss}">
  </asp:BoundColumn>