更新数据库表结构和存储过程是为了维护而用，以索引osql查询帮助：
osql
[-?] |
[-L] |
[
{
{-U login_id [-P password]}
| -E
}
[-S server_name[/instance_name]] [-H wksta_name] [-d db_name]
[-l time_out] [-t time_out] [-h headers]
[-s col_separator] [-w column_width] [-a packet_size]
[-e] [-I] [-D data_source_name]
[-c cmd_end] [-q "query"] [-Q "query"]
[-n] [-m error_level] [-r {0 | 1}]
[-i input_file] [-o output_file] [-p]
[-b] [-u] [-R] [-O]
]
可怎么执行，都不成功，是不是master.dbo.xp_cmdshell只能用于查询语句，
不能用于更新语句
