关于offline,including

lbqlbq 2002-04-03 05:02:40
请问alter tablespace_name offline;中offline

和drop tablespace **** including contents中的including contents什么意思,请指教
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lbqlbq 2002-04-04
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cascade constraints什么意思啊,多谢
rwq_ 2002-04-04
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drop tablespace yourtablespace including contents cascade constraints;
lbqlbq 2002-04-04
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还有其他的参数吗?
lbqlbq 2002-04-04
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cascade constraints什么意思啊,多谢

KingSunSha 2002-04-03
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offline:离线,一旦offline,该表空间不能被访问
including contents:包括所有的内容。drop tablespace mytbs including contents就是把表空间连同其中的内容全部删除。
如果不加including contents,则只能删除空的表空间,而存有内容的表空间是无法删除的。
Key Features Get straight into the action with step-by-step recipes that show you how to put Service Workers to work Find out what Service Workers can do for your app, then do it! Get the first in-depth look at this important new feature for web developers Book Description It would be nice to have web apps that work offline and send push notifications. This is now possible with Service Workers, which can add native-like functionality to your web apps without requiring a download. This book will get your mobile and web apps functioning without Internet connectivity, improve performance and network interaction in order to increase the level of availability, and show you how to build performant applications that seamlessly integrate with third-party APIs. We'll show you how to add Service Worker functionality to web apps and sites, access offline content through basic and advanced techniques, and build powerful interactive system notifications. We'll also teach you about cache functionality and assets to provide immediate load even over narrow connections. We conclude by giving you various tips to improve app performance, including the background sync technique. By the end of this book, you'll know build high performing and faster web and mobile applications with Service Workers. What you will learn Display a custom offline page Cache critical resources for offline use Implement offline Google Analytics Get network responses offline Implement push notifications Improve performance of your app About the Author Sean Amarasinghe is a software developer from Melbourne, Australia. He is a developer, designer, photographer, and also a blogger. He blogs about development, design, technology, and photography. He is passionate about offline apps and what they bring to the user. He has firsthand experience of how well offline apps work. He has written a couple of blog posts about offline cache manifests, as well as service workers. Table of Contents Chapter 1: Learning Service Worker Basics Chapter 2: Working with Resource Files Chapter 3: Accessing Offline Content Chapter 4: Accessing Offline Content with Advanced Techniques Chapter 5: Reaching Beyond the Offline Cache Chapter 6: Working with Advanced Libraries Chapter 7: Fetching Resources Chapter 8: Experimenting with Web Push Chapter 9: Looking at General Usage Chapter 10: Improving Performance

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