C#中SQL Command的基本用法

using System;using System.Data.SqlClient;namespace CommandDemo{  class Program  {    static void Main(string[] args)    {      //创建数据库      string constr = "Server = .; user=name;pwd=mima;database=mysql";      SqlConnection myCon = new SqlConnection(constr);      try      {        myCon.Open();        /*创建一个表        string sql = "select * form mytable01";        SqlCommand myCom = new SqlCommand(sql, myCon);        myCom.CommandTimeout = 2; //出错的等待时间，2s内没有成功就认为出错了         Console.WriteLine("创建对象成功");*/        /*-------更改数据 ExcuteNonquery 插入语句举例----------        myCon.Open();        //添加数据        string sql = "insert mytable01(name,gender,age,department)values('姓名'，'男'，35,'部门')";        SqlCommand myCom = new SqlCommand(sql, myCon);        myCom.ExecuteNonQuery();        Console.WriteLine("去数据库查看，已完成");        */        //ExcuteScalar  获得最大值举例        myCon.Open();        string sql = "select max(age) from mytable01";        SqlCommand myCom = new SqlCommand(sql,myCon);        Console.WriteLine("年龄最大的是："+myCom.ExecuteScalar()+"岁");      }      catch(Exception ex)      {        Console.WriteLine(ex.Message.ToString());      }      finally      {        myCon.Close();      }      Console.Read();    }  }}