Database Wildcard

It is well known that query optimization is an unavoidable topic in any database. For database engineers, optimization is the most challenging job. MySQL Open source database is no exception. In fact, the author believes that the database optimization is not as much as we imagine the suffering. 　　Under normal circumstances, you can start from the following four details to do a good job in the MySQL database query optimization. First, use the Explain keyword to evaluate the flaw in the query statement as shown in the following figure, now the author in the database to execute a simple select ...

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In an easy-to-understand way, this article focuses on how to leverage existing structures to successfully load the http://www.aliyun.com/zixun/aggregation/18278.html ">" that BIL currently loads into the MDM database Data type to add more tables. The primary purpose of the MDM Basic Initial Load (BIL) DataStage project is to quickly insert data into a predefined set of core MDM database tables ...

Learning is not simply reading and browsing, on the contrary is a process of accumulation, one through continuous learning, and constantly enrich their knowledge system, indexing process. 　　Then share my experience with you. High-quality information sources and efficient learning no doubt, Google is a good tool, we can find better resources, but only if you must know the keyword to search, no keyword, do not know what to look for. In general, people are not likely to know what they don't know (Unknown u ...).

A few suggestions to improve SQL execution efficiency: Try not to include subqueries in where; queries about time, try not to write: where To_char (dif_date, ' yyyy ') =to_char (' 2007-07-01 ', ' yyyy '); In the filter condition, the condition in which the maximum number of records can be filtered must be placed at the end of the WHERE clause, and the last table (underlying table, driving table) in the FROM clause will be first ...

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Musc++le (Multi User server Client linking Environnement) is a multi-channel messaging server and network API. The client network APIs are available in several languages, including: C,c++,c#,delphi,java and Python. Muscle is able to serialize the message object's stream stream through the network, including the server program, which allows its customers to each information and the hierarchical database and storage information on its server side, the support of the database through layered wildcard characters ...

Musc++le (multiple http://www.aliyun.com/zixun/aggregation/10785.html "> User Server Client Connection environment) is a multi-channel messaging server and network API. The client network APIs are available in several languages, including: C,c++,c#,delphi,java and Python. Muscle is able to serialize the message object's stream stream through the network, including the server program, allowing each of its customers information and services in its ...

Musc++le 5.60 This version defaults to enable http://www.aliyun.com/zixun/aggregation/9485.html ">ipv6 support. It can be disabled-dmuscle_avoid_ipv6. Added a new QT sample call to Qt_advanced_example. It demonstrates how to run a multithreaded muscle server within a QT GUI application, and how to make communication with its graphical user interface. Lord ...