T Sql Case When Else

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The complete collection of SQL statement operations is worth permanent collections

The complete collection of SQL statement operations deserves to be permanently stored the following statements are part of the MSSQL statement and are not available in Access. SQL classification: ddl-data Definition language (create,alter,drop,declare) dml-Data Manipulation Language (Select,delete,update,insert) dcl-Data Control Language (Grant,revoke, Commit,rollback first, briefly introduce the basic statement: 1, Description: Create number ...

Construction of enterprise security building open source SIEM platform (below)

The establishment of enterprise security building Open source SIEM platform, SIEM (security information and event management), as the name suggests is for security information and event management system for most businesses is not cheap security system, this article combined with the author's experience describes how to use open source software Analyze data offline and use algorithms to mine unknown attacks. Recalling the system architecture to WEB server log, for example, through logstash WEB server to collect query log, near reality ...

Concatenation (Join) and segmentation (Split) of MSSQL strings

The concatenation (join) and segmentation (split) of MSSQL strings are often used by masters using select number from Master. spt_values WHERE type = ' P ', this is a good way to do it, but there are only 2048 digits, and the statement is too long and not convenient. In short, a digital assistance table (100,000 or 1 million per person needs), you deserve it. 2. Useful index of the calendar table: ★★★☆☆ "SQL Programming Style" a book suggests an enterprise ...

Build highly available MongoDB clusters

MongoDB company formerly known as 10gen, founded in 2007, in 2013 received a sum of 231 million U.S. dollars in financing, the company's market value has been increased to 1 billion U.S. dollar level, this height is well-known open source company Red Hat (founded in 1993) 20 's struggle results. High-performance, easy to expand has been the foothold of the MongoDB, while the specification of documents and interfaces to make it more popular with users, this point from the analysis of the results of Db-engines's score is not difficult to see-just 1 years, MongoDB finished the 7th ...

Storage inventory: Ten worthwhile cloud deployments

Editing this list is like choosing the top ten Classic rock songs. There are always people who disagree with your choice, and there are too many good things to pick. What you choose depends largely on your personal preferences. But here on cloud deployments, I believe the following cloud deployments are the most interesting: 1. Internal Cloud upgrade Sales EMC is not just talking and not doing on the cloud. Within EMC's internal IT organization, the company is actively serving internal users in the form of cloud-based services. EMC has created a foundation for EMC hardware/software, Dell Servers, and VMware ...

Counting ten High-profile Cloud deployments

The concept of cloud storage has gradually taken root, and the following 10 cases of cloud storage will give readers more intuitive feelings. 1. Internal Cloud upgrade Sales EMC is not just talking and not doing on the cloud. Within EMC's internal IT organization, the company is actively serving internal users in the form of cloud-based services. EMC has created a framework based on EMC hardware/software, Dell Servers, and VMware to provide users with a virtual desktop through its cloud. However, EMC's intent is not to provide all services and applications through the cloud. EMC's model is for users ...

Take full advantage of hadoop:mapreduce patterns and examples of different scenarios

Working with text is a common usage of the MapReduce process, because text processing is relatively complex and processor-intensive processing. The basic word count is often used to demonstrate Haddoop's ability to handle large amounts of text and basic summary content. To get the number of words, split the text from an input file (using a basic string tokenizer) for each word that contains the count, and use a Reduce to count each word. For example, from the phrase the quick bro ...

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