Sql Server 2008 Questions

Setting filter conditions to improve indexing efficiency good indexes are key to SQL Server database performance, but efficient indexes are carefully designed. As we all know, a primary key is a unique identifier for a data object, and if there is no clustered index in the datasheet, the SQL Server database will create a clustered index (Clustered index) for the primary key by default in order to maintain the uniqueness of the key. Unless the user specifically specifies that the index should be created as a nonclustered index (non-clustered index). There is no doubt that we ...

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This paper is an excerpt from the book "The Authoritative Guide to Hadoop", published by Tsinghua University Press, which is the author of Tom White, the School of Data Science and engineering, East China Normal University. This book begins with the origins of Hadoop, and integrates theory and practice to introduce Hadoop as an ideal tool for high-performance processing of massive datasets. The book consists of 16 chapters, 3 appendices, covering topics including: Haddoop;mapreduce;hadoop Distributed file system; Hadoop I/O, MapReduce application Open ...

Cloud computing so far has been considered hot speculation, but still not been fried, and now the big data began to get hot again. Most of the media can see that the era of cloud computing is coming, and now some people think the big data era has arrived. The menace of cloud computing has left many CIOs at large and medium-sized companies feeling anxious because the new challenges brought by cloud computing to CIOs are clearly out there. The CIOs on the enterprise did not take the training course of cloud computing shortly afterwards, and on the other side they heard another wave of big data coming. CIO who study ...

Cloud computing has been hot, but not yet cooked, and now big data is coming. Many media can see, address the era of cloud computing, and some people think that the big data age. The surge in cloud computing has made many large and medium-sized enterprise CIOs somewhat anxious because the new challenges to the CIO from cloud computing are self-evident. The Enterprise CIO has just completed a training course on cloud computing, while the other side hears the industry is waving "big data". What is the key to the CIO's study? Is big data an aggravating or a good bureau? Cloud computing and big data met at such a time, from some kind of ...

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