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System.ServiceProcess.ServiceController   myController   =
new   System.ServiceProcess.ServiceController("MSSQL$ACCP4444"); //·þÎñÃû³Æ ÕÒÁ˰ëÌì²ÅÕÒµ½£¬±¿ËÀÎÒÍêÁË¡£ÔÚ·þÎñÉÏÓÒ¼üÊôÐÔ£¬ÄÜ¿´µ½
if (myController.CanStop)
{ }
else
{
   myController.Start();
}
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using System;
using System.Collections.Generic;
using System.Text;
using System.Data.SqlClient;
using System.Xml;
using System.Data;
namespace MyDbTest
{
class Program
{
static void Main(string[] args)
{
SqlConnection thisConnection = new SqlConnection(
@ ......

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   ֮ǰ¾É·½·¨ÊÇʹÓà alter session set events ..  »òÕßʹÓÃdbms_system.set_ev·½Ê½
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Student(S#,Sname,Sage,Ssex) ѧÉú±í
Course(C#,Cname,T#) ¿Î³Ì±í
SC(S#,C#,score) ³É¼¨±í
Teacher(T#,Tname) ½Ìʦ±í
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  select a.S# from (select s#,score from SC where C#='001') a,(select s#,score
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