你正在SQL SERVER 2005 数据库中创建一个从联系人表删除联系人数据的存储过程。在存储过程中包含如下的语句来处理可能发生的任何错误。 在你执行存储过程后发现,事务任然保持打开状态。为了正确的处理打开的事务,你应该如何修改你的存储过程?() ["在CATCH语句块增加 COMMIT TRANSACTION命令","在TRY语句块移除COMMIT TRANSACTION命令","在CATCH块增加 ROLLBACK TRANSACTION命令","在TRY块增加ROLLBACK TRANSACTION命令"]
试述非正式群体的含义及特点?
A Windows Azure application connects to a SQL Azure database. Connections to the database are being dropped due to throttling. You need to recommend an approach for identifying the root cause of the problem. Which two actions should you recommend?() [" Use Dynamic Management Views to analyze performance issues."," Decrease the connection timeout in the database connection string."," Make sure the application is closing database connections that are not needed."," Use SQL Profiler to analyze performance issues by configuring it to connect to SQL Azure."]
您正在评估购买一台配备以下硬件的笔记本计算机:1.6 千兆赫 (GHz) 32 位处理器,1024 MB RAM ,1 个使用共享内存的视频卡,4 GB 固态驱动器.您需要确保可以在笔记本计算机上安装 Windows 7 Enterprise。 您应该更改哪些硬件组件?() ["硬盘","处理器","RAM","视频卡"]
机械性窒息死的一般征象是:() ["颈部索沟","蕈状泡沫","颜面青紫肿胀","皮肤和结膜下出血点","Tardieu氏斑"]
设一个关系为R(A,B,C,D,E),它的最小函数依赖集为FD={A→B,A→C,(C,D)→E},该关系只满足(),若要规范化为第三范式,则将得到()个关系。