title: What is the Date type in npgsql?
body: <p>I am using postgreSQL database. I need to add "Date" parametres with SQL query. What do I have to write where I wrote in the code "XXX" 
  Here is the source code:</p>
  
  <pre><code>NpgsqlCommand RupCmd = new NpgsqlCommand("UPDATE TABLE SET dat1=@dno,dat2=@dlidz,id_viesis=@idv,id_istaba=@idi WHERE rezervacijas_id=@id", con);
  RupCmd.Parameters.Add(new NpgsqlParameter("@dno", NpgsqlTypes.NpgsqlDbType.Date, XXX, "dat1"));
  RupCmd.Parameters.Add(new NpgsqlParameter("@dlidz", NpgsqlTypes.NpgsqlDbType.Date, XXX, "dat2"));
  RupCmd.Parameters.Add(new NpgsqlParameter("@idv", NpgsqlTypes.NpgsqlDbType.Integer, sizeof(int), "id_viesis"));
  RupCmd.Parameters.Add(new NpgsqlParameter("@idi", NpgsqlTypes.NpgsqlDbType.Integer, sizeof(int), "id_istaba"));
  RupCmd.Parameters.Add(new NpgsqlParameter("@id", NpgsqlTypes.NpgsqlDbType.Integer, sizeof(int), "rezervacijas_id"));
  </code></pre>