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The case in the SQL statement is a bit like the multi-branch of a switch in a high-level programming language such as Java, but a little bit different is when the post is followed by when, in addition, when the subsequent branches are a bit like if followed by else. This is my personal acquaintance, case. When: Then.. [Else]..Below, looking at MySQL's Help information, you can see the basic syntax structure

Tags: article solve problems arch economy end based on complete HTM--Case has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END--case search functioncase If sex = ' 1 '

MySQL database, table name, column name, And alias rules in linux: 1. the Database Name and table name are case sensitive. 2. table aliases are case sensitive. 3. variable names are case sensitive. 4. the column name and column alias are case-insensitive. MySQL is case insen

The sharing of test cases and test plans between team projects is a concern for many customers. Especially in the team that develops the product + service, the sharing requirement of test cases is higher. The following is an analysis of your experience in how to implement use-case sharing between team projects in teams Foundation server. Same team Project : In the same team project in TFS, you can easily implement shared maintenance of test cases, an

Use case modelThe use case model is used to document the requirements of the system, which provides a means of communication between the system and the user and other participants.PerformerUse case diagrams show the interaction between systems and entities outside the system. These entities are referred to as performers. Performers represent roles that can includ

ArticleDirectory Extend, include, and inheritance in the use case diagram The use case diagram is a diagram of what roles can do through a certain system. The use case diagram relates to the external performance of the system, the interaction between the system and people, and the interaction between the system and other systems. The meanings

The use case diagram mainly includes use cases, activists, and relationships. Use Cases: A description of the sequence of actions that the system, subsystem, or class interacts with external participants, including various normal sequences and error sequences. Case analysis can be considered as a decomposition of system functions. How to determine the granularity of use cases:Generally, there are no mandat

The previous blog summarized the use case diagram, in which the relationship between use cases is only included, because the relationship between use cases is not particularly profound. This is also because the UML use case diagram has not passed the acceptance of the master. The relationship between use cases must be further understood. This blog will summarize the relationship between use cases after furt

Two days ago, I encountered a very strange problem. In eclipse, I used Maven install to compile all the compiled files. the names of the class files are changed to lower-case letters, causing compilation failure for the projects that reference these classes later! I searched the internet and almost never encountered such a strange problem. Later I suspected it was a problem with the Java version or Maven plug-in. After trying a new JDK and re-installi

1. Set SQL script case insensitiveUse [master]GoALTER DATABASE [DatabaseName] COLLATE Chinese_prc_ci_aiGo 2. Set large SQL script case sensitiveUse [master]GoALTER DATABASE [DatabaseName] COLLATE Chinese_prc_cs_aiGo 3. Set reference value_ci_ai is case-insensitive, accent insensitive, kana type insensitive, width insensitive_ci_ai_ws is

CASE has two formats:The simple CASE function compares an expression with a group of simple expressions to determine the result.The CASE search function calculates a group of Boolean expressions to determine the result.Both formats support the optional ELSE parameter.SyntaxSimple CASE functions:CASE input_expressionWHE

I. Elements: 1. Roles, use cases (function description), relationships (generalization, dependencies, associations, implementations) 2. Element meaning: Actor 1. Can be a person, a thing, an object2. Analyze role considerations: People who use the system directly, maintenance personnel, peripherals (people, printers), connected systems3. Participate in the implementation process of use cases3. Graphic characters: Case

The non-standard of the domestic software testing process, attention to development and contempt of the phenomenon of testing still exist, the importance of software testing, testing methods and testing process, there are many inappropriate understanding, which will further affect the development of software testing activities, and hinder the improvement of software testing quality. The following list of test case design of the five major misunderstan

Tags: blog http io using AR data problem code SPApplicable sqlserver,oracleCaseWhen condition 1 then result 1When condition 2 then result 2When condition 3 then result 3When condition 4 then result 4.........When condition n then result nELSE result XENDCase has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Th

A use case diagram OverviewThe so-called use case diagram is used to describe the user's needs, describe the function of the system from the user's perspective, and point out the performer of the function, emphasizing who is using the system,What functions the system has done for performers.Use case diagram is the product of requirement analysis, which describes

Tags: history run sts where 51cto mys SQL statement StudentCase has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END--case search functioncase If sex = ' 1 ' Then ' man 'When sex = ' 2 ' Then ' women 'Else ' other

This course focuses onSpark, the hottest, most popular and promising technology in the big Data world today. In this course, from shallow to deep, based on a large number of case studies, in-depth analysis and explanation of Spark, and will contain completely from the enterprise real complex business needs to extract the actual case. The course will cover Scala programming, spark core programming, spark SQL

Software Test Case Design Principles-51testing software testing network-China Software tester Spiritual Home http://www.51testing.com/html/74/n-227374.html InTestIn case design, in addition to complying with the basic test case writing specifications, some basic principles should also be followed. 　　1. Try to avoid vague Test Cases Vague test cases make the test

There are only 3 elements in the Use case diagram, which are roles (actor), "Use Cases", "Association (Association)". The so-called "role" is what people or things use your system, that is, to do some things. For example, you go to an ATM machine to withdraw money. So in this use case diagram, you and the ATM machine are "role" "use cases" that are actions, actions, or triggering events. For example

Label:Case has two formats. Simple case function and case search function.--Simple case function Sexwhen ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other ' end--case search function case when sex = ' 1 ' Then ' man ' when sex = ' 2 ' Then ' Women ' Else ' other ' E