UML use case Diagrams: guidelines
Released: 2012-3-21
In Visual Studio flagship edition, you can draw a use case diagram to summarize the users of your
http://m.blog.csdn.net/blog/tianyazaiheruan/8988420Today qnovations teacher in the use of switch, this design to the most basic content, may forget some of its basic grammar, there are some errors, so impromptu from a variety of data query summed up
Case has two formats. Simple case function and case search function.--Simple Case function Case Sex When ' 1 ' Then ' men ' When ' 2 ' then ' women ' Else ' other ' END --case search function case If sex = ' 1 ' Then ' man ' When sex = ' 2 '
How to use case in SQL
Case has two formats. Simple case function and case search function.
Copy Code code as follows:
--Simple Case function
Case Sex
When ' 1 ' THEN ' male '
When ' 2 ' THEN ' woman '
Else ' other '
Enable ThinkPHP to support access using case-sensitive URLs. thinkphp is case-sensitive. To enable ThinkPHP to support access by case-sensitive URLs, thinkphp is described in this article as an example to enable thinkphp to support access by
Case has two formats. Simple case function and case search function. Simple case function Case sex when ' 1 ' THEN ' man ' when ' 2 ' THEN ' Else ' other ' end--case search function case when sex = ' 1 ' THEN ' man ' when sex = ' 2 ' THEN ' woman '
Reprinted from http://lj.soft.blog.163.com/blog/static/7940248120109215191358/Case has two formats. Simple case function and case search function.--Simple case function when ' 1 ' then ' Male ' when ' 2 ' then ' women ' else ' other '
In our project development, we often encounter the requirements of multiple conditional fuzzy queries. There are two common solutions for this: one is to stitch the SQL string at the end of the program, construct the corresponding SQL string based
Thread-Safe single case modeLazy mode : That is, the first time the class instance is invoked, a new instance of that class is generated, and only this instance is returned at a later time.
Locks are required to ensure thread safety: Reason:
I. Introduction to UML Use case modeling
Use case modeling is part of UML modeling, and it is the most basic part of UML. The most important function of use case modeling is to express the functional requirements or behavior of the system. According
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