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) When using the data-oriented SQL language for programming, the optimization algorithm should be taken as far as possible.In conclusion, in order to improve the efficiency of database operation, it must be optimized from database system level, database design level, program implementation level, and the threeAt the same time on a level.The above 14 skills, is a lot of people in a large number of database analysis and
example, the coding logic of a program, the actual SQL statement used, is divided within the scope of the application design. Factors that affect the performance of DB2 systems include, for example, installation options, buffer pool size, allocation priority for the DB2-related address space, and so on. The focus of this paper is the design of DB2 database. But there are times when the boundaries between t
Object-oriented design principles are at the heart of oops programming, but most of the Java programmers I've seen are enthusiastic about design patterns like Singleton (singleton), Decorator (adorner), OBSERVER (Observer), Instead of focusing enough attention on learning object-oriented analysis and design. It is impo
designers say web pages should be loaded in 15 seconds. 05 Website Upgrades Always pay attention to the operation of the website. Well-performing hosts may run slowly as the number of visitors increases. However, if you don't want to lose your visitors, be sure to plan your upgrade plan carefully. 06 adherence to basic principles Even if you don't understand HTML, you can create a Web site that looks reasonable by simply buying a copyrighted, WYS
system sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design. (3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary key A value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too ma
sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design.(3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary keyA value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too many fields
system sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design.(3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary keyA value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too many
sideAfter the processing of the C + + language is completed, the final storage is appended to the table. This is the experience of telecom billing system design.(3) If a table is found to have too many records, such as more than 10 million, the table is split horizontally. The horizontal split is done with the table primary keyA value of PK is a line dividing the table's records horizontally into two tables. If you find that there are too many fields
Reprint Address: http://blog.jobbole.com/685/the following principles, not just software development, can be extended to other production activities, even in our lives .Don ' t Repeat yourself (DRY)Dry is one of the simplest laws and is the easiest to understand. But it can also be the hardest to apply (because to do so, we need to do a lot of work on generic design, which is not an easy task). It means tha
Original link: API Design principles–qt WikiBased on Gary's influence on Gary Gao's translation: API design guidance for C + + QT's design level is well-known in the industry, consistent, easy to master and powerful API is one of QT's most famous advantages. This article is the QT official web API
This articleArticleYou don't need to understand it once. If you can understand it all at once, I think the design mode is no longer difficult for you .. because the design pattern is to embody these principles, you can regard the design principle as a language, and the design
Code that complies with the following six principles is generally considered to be extensible, maintainable, and highly reusable code: 1. Principle of single responsibility Don't meddle. 2. The principle of open closure Open to extension, closed for modification 3. Richter substitution principle Subclasses can implement abstract methods of the parent class, but they cannot override non-abstract methods of the parent class. Subclasses can add their ow
11 principles of object-oriented design Single Duty principle (the Responsibility Principle , abbreviation SRP ) Open-Close principle (the Open-close Principle , abbreviated as OCP ) Liskov Replacement principle (the Liskov Substitution , hereinafter referred to as LSP ) Dependency Inversion principle (the Dependency inversion Principle , referred to as Dip ) Interface Isolation principle (the I
software development efficiency, improving software quality, saving development costs, and improving system maintainability. The purpose of object-oriented design reuse is to enable maintainability reuse. In the object-oriented design, maintainability reuse is based on the object-oriented design principles. Thes
In the previous article, we talked about the design patterns. Next, let's talk about some of the principles we often follow in object-oriented design. These principles are the result of numerous previous experiences. Only by following these principles can you involve excelle
Good Design Master, or too much bragging, but according to the following seven basic principles at least you can become a skilled designer. This will be the shortest and most informative series of blog posts, and you'll know how to become a better designer after you see it. Keep in mind: These principles are not laws and can be broken. They're just generic instru
should be strictly verified, even though it is not at the product level. Otherwise, it will affect the promotion and application of their chips. Even if there is a place where the peripheral circuit can be tapped, the usage of the CPU pin connection is absolutely trustworthy, of course, if there are multiple reference designs with Different Pin Connection Methods, we can read the CPU chip manual and error table carefully or contact the manufacturer for confirmation. In addition, before the
Google has come to the benefit of mankind! Today @ 10 Realities Why this translation is not a pity even if it is spent, because it not only provides a simple and inexpensive way to experience virtual reality, but also a "do-it-yourself" version of the document. For designers, the 7 principles of design are validated, VR hot also on these two years, do not learn on the outdated slightly! Virtual reality, th
method's preconditions (that is, the parameter of the method) are more lenient than the input parameters of the parent class method. 4). When a method of a subclass implements an abstract method of the parent class, the post condition of the method (that is, the return value of the method) is more than 1. Detailed introduction to six principles in design mode Summary: Single Responsibility Principle defi
First, the importance of design in software developmentImportanceWhen we went to college, we always didn't understand why we had to talk about such a theoretical thing, it was just a feeling that it was useless, we wanted to learn something that we could see, and when you graduated you would find that basic knowledge was important, And this knowledge has a commonality is can be separated from the specific technology or problems exist, is a long-term g
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