commuter case

Label:CaseWhen condition 1THEN Results 1When condition 2THEN results 2When condition 3THEN results 3When condition 4THEN results 4.........When condition Nthen result nelse result XENDCase has two formats. Simple case function and case search function.--Simple Case functionCase SexWhen ' 1 ' Then ' men 'When ' 2 ' then ' women 'Else ' other ' END--

The worst place to case When--then--else--end should be that it is used both in normal fields and in aggregate functions.Original: http://blog.itpub.net/26451903/viewspace-733526Case has two formats. Simple case function and case search function.--case search function (recommended)

exist This table is clearly present, why can't the program find the table??Reason Lookup:because MySQL is the default for Linux to differentiate table name casing . MySQL case sensitivity setting is determined by the parameter lower_case_table_names, where:1) lower_case_table_names = 0Case-sensitive (that is, case sensitivity to table names), which is the default setting. When this is set, the tabl

When I first started using mysql, I first wanted to differentiate the case sensitivity of column names. I found many methods on the Internet, so 1. After mysql is installed in linux, the default value is: case-sensitive for table names, not case-sensitive for column names; 2. 2. log on to the/etc/my. add lower_case_table_names = 1 after [mysqld] In cnf and rest

ArticleDirectory Basic Concepts Instance requirements It is important to clarify the relationship between use cases when drawing a use case diagram. The relationships of use cases include generalization, extended, and include ). Include and extend are the most confusing. Next we will thoroughly clarify the relationship between the three Based on the instance. Basic Concepts Use case diag

How to Use Case in SQL (Part 2) Next 4. Conditional update. For example, the following update conditions are available: For employees with a salary of more than 5000, the salary is reduced by 10%. Employees with salaries between 2000 and 4600 increase by 15% You can easily choose to execute two update statements, as shown below: -- Condition 1Update personnelSet salary = salary * 0.9Where salary >=5000;-- Condition 2Update personnelSet salary =

In UML, use case seems to be the most simple. The main function of case modeling is to express the functional requirements or behaviors of the system. In my understanding, Case modeling can be divided into use case diagrams and case descriptions. A Use

In summary, the use of switch is to determine if the expression after the case matches the expression after switch, and once the case is matched, the subsequent program code is executed, regardless of whether the following case matches until the break was met . Do not match to find default. No matter where default is placed. As soon as a junction (

MySQL case sensitivity and naming rules bitsCN.com MySQL case sensitivity and naming rules Note: For most of the content in this article, refer to relevant articles from the Internet 1. in MySQL, a database corresponds to a folder, and tables in the database are stored in the folder as files. therefore, the sensitivity of the operating system to the case sensitiv

Requirements and objectives: In most automated software tests for the UI, case management issues are usually designed. When you already have a test case that has been implemented and completed, if the following two things have changed, what kind of countermeasures will you adopt? 1. Objectives Program The operation logic of is changed, such as the move or delete button; 2. the underlying implementation fra

Worst, average and optimal uptime (worst, Average and best Cases)In the previous article, we discussed how incremental analysis can solve the problem of analytic algorithms, so in this article, we use linear search to illustrate how to analyze the performance of the algorithm using the Stepwise analysis method.We analyze the algorithm from three aspects:1. Worst Case scenario2. The average situation3. Best caseThis is a very simple linear lookup code

us have more time to do more meaningful things, if you think you do one thing is repetitive, and there are regular and feasible, do not consider automation. three, in the game for the functional test test case of writing a brief discussion Find out what features are in the game first: a) What are the features of the game open? I. Different games for different functions, but the current mainstream some of the functions are divided into the following c

This digest from: http://www.cnblogs.com/kissdodog/p/3154371.html (thanks to the author for sharing, summed up very well)A column-based logical expression is actually a case expression. Can be used after Select,update,delete,set and in,where,order by and having clauses. Since this is a T-SQL query, only the case expression is used in the SELECT clause and the ORDER BY clause.The action of the

Next we will talk about the mysql stored procedure case statement syntax and instance tutorial. on the home page, let's take a look at the simple description of the case statement, and then explain the specific usage of the case with examples. Next we will talk aboutMysql tutorial stored procedure case statement syntax

Sometimes some examples of WEB projects are used in different scenarios, such as JavaScript scripts, website administrators, and third-party suites. If each example is saved in one copy, it is easy to refer to the troubles on the primary node (such as modifying the primary node of the case and forgetting to commit the primary node to the B case ), at this time, we can summarize the structure of the

[Sina Vivi] [poco network Abstract] [365key] [bo cai] [Yi You Xiang] [you abstract] [younote] [Tianji network Abstract] [Hexun network Abstract] Software Engineering is a kind of book to learn, but the most critical requirement of software engineering is the rational establishment of use case scenarios. This article seems to have no university textbooks to talk about, it seems that Chinese university teachers in the Computer Science Department have no

1.mysql Case Sensitive Configuration MySQL case sensitive configuration related to two parameters,Lower_case_file_system and lower_case_table_names. View the current case-sensitive configuration of MySQL Show global variables like '%lower_case% '; +------------------------+-------+| Variable_name | Value |+------------------------+-------+| Lower_case_f

Note: The main content of this article is referenced from Internet related articles1.MySQL Case Sensitive RulesIn MySQL, a library will correspond to a folder, the library of the table will be stored in the folder in the file, so the sensitivity of the operating system to the case of the database and the table case sensitive decision-making (MySQL has a read-only

After replicating the portal database in the development environment to the new environment today, there is a phenomenon that the primary key cannot be found when using the Sqlsugar ORM Framework for database operations. The key point was discovered for a long time. Hereby record.1. Development environment:Operating system: CENTOS7 64-bitMemory: 1GBCPU 1/1Network adapter: Bridge modeInstallation mode: Minimized installationSystem Language Settings: zh_cn.gb2312Database version: MySQL 5.6.29 bina

The Switch...case statement in Swift can determine the object type, and the objective-c must be an integer.Can not penetrate, can not write break, var rank = "A" switch rank{case "a"://equivalent to if print ("excellent") Case "B"://equivalent to else if print ("excellent") case "C"://equivalent t