SQL语句来备份还原数据库

//通过SQL语句备份数据库
use master;BACKUP DATABASE dbHotelSystem TO DISK ='F:\\DB100151043851.bak'

//通过SQL语句还原数据库 （还原数据库后最好要求用户从新启动系统，保证数据还原）
use master; RESTORE DATABASE dbHotelSystem FROM DISK ='F:\\DB100151043851.bak' WITH REPLACE

//注意:很多时候不能直接还原,因为数据不是独占打开,可先执行一下方法。在进行还原操作
public void kill()
{
//杀死原来所有的数据库连接进程 using System.Data.SqlClient;
SqlConnectionStringBuilder conectionStringBuilder = new SqlConnectionStringBuilder();
conectionStringBuilder.DataSource = ".";
conectionStringBuilder.InitialCatalog = "master";
conectionStringBuilder.IntegratedSecurity = true;
SqlConnection con = new SqlConnection(conectionStringBuilder.ConnectionString);
con.Open();
string sql = "SELECT spid FROM sysprocesses ,sysdatabases WHERE sysprocesses.dbid=sysdatabases.dbid AND sysdatabases.Name='dbHotelSystem'";
SqlCommand cmd = new SqlCommand(sql, con);
SqlDataReader dtr;
System.Collections.ArrayList list = new ArrayList();
try
{
dtr = cmd.ExecuteReader();
while (dtr.Read())
{
list.Add(dtr.GetInt16(0));
}
dtr.Close();
}
catch (SqlException sqlex)
{
throw new Exception(sqlex.ToString());
}
finally
{
con.Close();
}
con.Open();
for (int i = 0; i < list.Count; i++)
{
cmd = new SqlCommand(string.Format("KILL {0}", list[i].ToString()), con);
cmd.ExecuteNonQuery();
}
con.Close();
}