DAX is not only an expression language, but also a query language and, when it comes to performance, the xVelocity in-memory engine is second to none. Scanning fact tables and performing leaf-level computation happens in a matter of milliseconds. Nevertheless, as with any other language, you can write good DAX or bad DAX, depending on your understanding of the engine internals. This session introduces DAX as a query language, showing the different ways of querying with DAX using real-world data. Some queries will be fast, others will need optimizations. Many practical examples based on common patterns and an analysis of the query plans will show how to get the best out of DAX.
Visual Studio LightSwitch provides the easiest way to create modern, data-centric, line of business applications for the enterprise. In this video, we will build and deploy from end-to-end, a full-featured business app that runs in Windows Azure and provides rich user experiences tailored for modern devices. We will also highlight some of the new features added to LightSwitch in Visual Studio 2013.
現在只要透過 SQL Server 的好夥伴 System Center 以及 SQL Server 管理套件，可以快速提供管理者所需的資料庫效能、可用性、組態監控、效能資料蒐集等資訊。當 DB 發生問題時 System Center 會主動通知管理者並告知問題所在，協助管理者在最短時間內排除障礙。同時還包含了可自訂的儀表板檢視、圖表檢視以及問題解決知識庫，加上各種豐富的報表，讓 DBA 一手掌握所有狀況! 即時是管理不同版本的 SQL Server，System Center 也能輕鬆做到。此外，當遇到長時間執行的交易問題時，System Center 也能辨別出是哪支程式的 SQL 語法所造成，真正釐清問題的所在!
ASP.NET Identity is a totally rewritten framework that brings the ASP.NET membership system into the modern era. ASP.NET Identity makes it easier to integrate different authentication systems such as local username, password as well as social logins such as Facebook, Twitter etc. It also gives you greater control over persisting data to your backend technology of choice. ASP.NET Identity is a game changer by bringing in more modern authentication systems such as Two-Factor Authentication. You can use ASP.NET Identity to secure Web Apps as well as Web APIs.