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我机器上SQL Server 2000的sa密码因为长时间不用忘记了，该如何重新设置？可以以“Windows身份验证”方式登录SQL查询分析器，然后执行EXEC sp_password NULL,'hello','sa',就可以将sa的密码改为hello了。一些文章介绍说xp_ cmdshell是个危险的存储过程，我该如何删除？在需要时如何恢复？到在SQLServer的查询分析器中使用存储过程sp_dropextendedproc就可删除xp_cmdshell这个存储过程，格式为：EXEC sp_dropextendedproc 'xp_cmdshell'，需要时可使用sp_ addextendedproc恢复，格式为：EXEC sp_addextendedproc xp_cmdshell, 'xplog70.dll'。我的SQL Server 2000在一次系统重新启动后就无法启动了，该怎么办？估计可能此前更改过操作系统的用户密码，可以到“控制面板”→ “管理工具”→“服务”→“ MSSQLSERVER”，双击该服务，然后选择“登录”，在“此账户”输入最新的用户密码，点击“确定”按钮，然后启动SQLServer服务就可以了。
让UNION与ORDER BY并存于SQL语句当中
SELECTTOPN[Id],[Name],[Comment]FROM[Product]WHERE[Type]='TYPE1'ORDERBYNEWID()
UNIONSELECTTOPN[Id],[Name],[Comment]FROM[Product]WHERE[Type]='TYPE2'ORDERBYNEWID()UNIONSELECTTOPN[Id],[Name],[Comment]FROM[Product]WHERE[Type]='TYPE3'ORDERBYNEWID()UNIONSELECTTOPN[Id],[Name],[Comment]FROM[Product]WHERE[Type]='TYPE4'ORDERBYNEWID()UNIONSELECTTOPN[Id],[Name],[Comment]FROM[Product]WHERE[Type]='TYPE5'ORDERBYNEWID()UNIONSELECTTOPN[Id],[Name],[Comment]FROM[Product]WHERE[Type]='TYPE6'ORDERBYNEWID()UNIONSELECTTOPN[Id],[Name],[Comment]FROM[Product]WHERE[Type]='TYPE7'ORDERBYNEWID()在查询分析器中执行如上语句会报错,这个问题起初会令您觉得UNION在这方面似乎有点软弱，难道UNION和ORDER BY就不能共存吗？当然可以，下面的代码或许能实现与上面代码希望实现的相同功能：SQL server 附加数据库出错 错误602:未能在sysindexes中找到数据库id 18中对象id 1
SELECT * FROM ( SELECT TOP N [ Id ] , [ Name ] , [ Comment ] FROM [ Product ] WHERE [ Type ] = ' TYPE1 ' ORDER BY NEWID ()) AS [ Product1 ] UNION SELECT * FROM ( SELECT TOP N [ Id ] , [ Name ] , [ Comment ] FROM [ Product ] WHERE [ Type ] = ' TYPE2 ' ORDER BY NEWID ()) AS [ Product2 ] UNION SELECT * FROM ( SELECT TOP N [ Id ] , [ Name ] , [ Comment ] FROM [ Product ] WHERE [ Type ] = ' TYPE3 ' ORDER BY NEWID ()) AS [ Product3 ] UNION SELECT * FROM ( SELECT TOP N [ Id ] , [ Name ] , [ Comment ] FROM [ Product ] WHERE [ Type ] = ' TYPE4 ' ORDER BY NEWID ()) AS [ Product4 ] UNION SELECT * FROM ( SELECT TOP N [ Id ] , [ Name ] , [ Comment ] FROM [ Product ] WHERE [ Type ] = ' TYPE5 ' ORDER BY NEWID ()) AS [ Product5 ] UNION SELECT * FROM ( SELECT TOP N [ Id ] , [ Name ] , [ Comment ] FROM [ Product ] WHERE [ Type ] = ' TYPE6 ' ORDER BY NEWID ()) AS [ Product6 ] UNION SELECT * FROM ( SELECT TOP N [ Id ] , [ Name ] , [ Comment ] FROM [ Product ] WHERE [ Type ] = ' TYPE7 ' ORDER BY NEWID ()) AS [ Product7 ] 果是采用sqlServer2005的话你用Sql2000附加Sql2005的数据库就会出现这种错误（解决方法：改用SqlServer2005附加一下，如果还想用Sql2000格式那就用导出sql语句等方式进行转换)
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