Data Types In Mysql With Examples

As the most popular open source database, MySQL is widely used in Web applications and other small and medium-sized projects. However, in many large IT companies, MySQL has gradually deviated from the original open source version after being highly optimized and customized, more like a branch, such as the Webscalesql of Facebook, which was not long ago open source. 　　Recently, Mr. Xiong has published a blog post, from the perspective of large-scale web site architecture development of the changes in MySQL application, here for you to share. This article mainly describes the different and ...

First, the importance of the index The index is used to quickly find a column in a particular value of the line. Instead of using an index, MySQL must start with the first record and then read the entire table until it finds the relevant row. The larger the table, the more time it takes. If the table in the query column index, MySQL can quickly reach a location to search the middle of the data file, there is no need to see all the data. Note that if you need to access most of the rows, sequential reads are much faster since we avoid disk searches. If you use Xinhua Dictionary to find "Zhang" the Chinese characters, do not use the directory, then ...

Either in the pitiful free database space or large e-commerce sites, reasonable design table structure, make full use of space is very necessary. This requires that we have a full understanding of the commonly used MySQL data types for database systems. Now I will write down my little experience to share with you. The numeric type of the MySQL data type The numeric type is divided into three categories according to my classification: integer classes, decimal classes, and numeric classes. My so-called "digital class" refers to DECIMAL and NUMERIC, which are the same type. It is strictly speaking not ...

In the "Up" section of the big data on Silicon Valley's observations (http://www.china-cloud.com/yunjishu/shujuzhongxin/20141208_44107.html?1418016591), I have basically combed through a relatively complete shape of the big data growth situation in the Silicon Valley region. A friend saw the "next" after the notice on the micro-blog to give me a message, I heard that the next chapter to introduce some of the company's large data department, ask if you can add a Google, especially Google ...

The greatest fascination with large data is the new business value that comes from technical analysis and excavation. SQL on Hadoop is a critical direction. CSDN Cloud specifically invited Liang to write this article, to the 7 of the latest technology to do in-depth elaboration. The article is longer, but I believe there must be a harvest. December 5, 2013-6th, "application-driven architecture and technology" as the theme of the seventh session of China Large Data technology conference (DA data Marvell Conference 2013,BDTC 2013) before the meeting, ...

Introduction: Open source data processing platform with its low-cost, high scalability and flexibility of the advantages has won the majority of network Giants recognized. Now Hadoop will go into more business. IBM will launch a DB2 flagship database management system with built-in NoSQL technology next year. Oracle and Microsoft also disclosed last month that they plan to release a Hadoop-based product next year. Two companies are planning to provide assistance with deployment services and enterprise-level support. Oracle has pledged to preinstall Hadoop software in large data devices. Big Data Revolution ...

Introduction: Open source data processing platform with its low-cost, high scalability and flexibility of the advantages has won the majority of network Giants recognized. Now Hadoop will go into more business. IBM will launch a DB2 flagship database management system with built-in NoSQL technology next year. Oracle and Microsoft also disclosed last month that they plan to release a Hadoop-based product next year. Two companies are planning to provide assistance with deployment services and enterprise-level support. Oracle has pledged to preinstall Hadoop software in large data devices. Large Data Leather ...

The intermediary transaction SEO diagnoses Taobao guest Cloud host technology Hall in understanding the Internet entrepreneurship Theory knowledge, began the field to carry out the actual operation of the website business. 　　In this chapter, we will explain in detail how to build a Web site that conforms to the user experience. First, the site of the page planning and style design of the previous Web site construction model, are through the learning of Web page production, a page of the production of HTML files, combined to create a static Web site. And now is often the use of special construction station procedures, after a simple installation, only need to add content on it ...

With the changing cloud world, you want to enter the cloud world in the face of a lot of choices where to go? Here are some examples of the use and testing of well-known cloud services. Before that, of course, we have to know that "cloud" is a service built on hosting your application. auto-scalling-when demand increases, you can automatically get more resources (typically more virtual machines) to respond to requests. This is rarely used in general applications, but it can guarantee that your service will no longer be paralyzed by excessive load, and that it will be icing on the cake only for the purchase you use ...

MongoDB is currently the best document-oriented free Open-source NoSQL database. If you are preparing to participate in a technical interview for the MongoDB NoSQL database, you might want to look at the following MongoDB NoSQL interview questions and answers. These MongoDB NoSQL interview questions cover the basic concepts of NoSQL databases, replication (Replication), fragmentation (Sharding), Transactions and locks, trace analysis Tools (Profiler), nuances, and logging features. Let's look at the following ...