使用SMO查找最近的备份

备份时间存储在msdb.dbo.backupund表中。这是一个例程,它接受一个打开的SQL连接、数据库名称和一个标志,该标志指示您是想要完整备份还是任何备份,并返回上次备份的时间。

请注意,此表有时会被整理,因此如果已经整理,则可能表示没有备份。

   //----------------------------------------------------------------------------------------
    // Function: GetLastBackupTime
    //
    // Input
    //    sqlConnection          - An open SQLConnection to the target SQL Server
    //    DatabaseName           - Name of the database which you are interested in
    //    fullDatabaseBackupOnly - Do you want only the time of the last full backup
    //
    // Output
    //    DateTime               - DateTime.MinValue indicates no backup exists
    //                             otherwise it returns the last backup time
    //---------------------------------------------------------------------------------------

DateTime GetLastBackupTime( SqlConnection sqlConnection, 
                            string        databaseName, 
                            bool          fullDatabaseBackupOnly )
{
    DateTime lastBackupTime = DateTime.MinValue;  

    string sqlTemplate = "SELECT TOP 1 backup_finish_date " +
                         "FROM msdb.dbo.backupset " + 
                         "WHERE database_name='{0}' {1} "
                         "ORDER BY backup_finish_date DESC";

    string sql = String.Format( sqlTemplate,
                                databaseName,
                                (fullDatabaseBackupOnly ) ? " AND type='D' " : "" );

    // open connection
    using (SqlCommand cmd = new SqlCommand(sql, sqlConnection, 
    {
       object retValue = _Command.ExecuteScalar();

       if ( retValue != null ) lastBackupTime = (DateTime)retValue;
    } 

    return lastBackupTime;
}

这是不可能的。