C# oracle to_date 日期型 参数传值

C#操作oracle，date字段，使用参数传值

例子一，获取三小时前的记录

public static DataTable Query()

{

const string sSql = "select xh,lsh,name from table where gxsj>to_date(:gxsj,'yyyy-MM-dd HH24:mi:ss')";

OracleParameter[] parameters = {new OracleParameter(":gxsj", OracleType.VarChar, 10)};

parameters[0].Value = DateTime.Now.AddHours(-3).ToString("yyyy-MM-dd HH") + ":00:00";

return DBUtility.DbHelperOra.Query(sSql, parameters).Tables[0];

}

例子二，获取大于当前时间的记录

public static string GetHphm(string sClsbdh)

{

const string sSql = "select name from table where sj>to_date(:yxsj,'yyyy-MM-dd')";

OracleParameter[] paramters = {new OracleParameter("sj", OracleType.VarChar, 10)};

paramters[0].Value = DateTime.Now.ToString("yyyy-MM-dd");

using (var mReader = DbHelperOra.ExecuteReader(sSql, paramters))

{

if (mReader.Read())

{

return mReader["name"].ToString();

}

}

return "";

}