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();
}
}
}
作者:Czhenya
链接:https://czhenya.blog.csdn.net/article/details/77483542
来源:CSDN
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