what switch case statement

Is there a SQL statement similar to switchcase in C? Is there a switch case statement similar to the C language in SQL? No. Use case when instead. For example, the following statement shows the Chinese year and month The Code is as follows: Select

What is the difference between single and double quotes in PHP? 1. As can be seen, the double-quote variable is parsed and output, and the single-quote variable is not resolved. 2. The resolution of single quotation marks is faster than double

Check PHP code optimization skills and php skills. PHP code optimization tips: check php skills. the purpose of PHP optimization is to get the fastest running speed and the most easily maintained code at the minimum cost. This article provides you

This article mainly introduces the basics of python, including file input and output, built-in types, dictionary operations, and other usage methods. I. variables and expressions The code is as follows: >>> 1 + 12>>> Print 'Hello world'Hello

In jquery, how does one terminate this loop or exit the loop? Check some information and try to find the following method:1. In the for loop, we use continue. Terminating this loop is included in the next loop, and using break to terminate the

PHP Development Web pages need to be stored in the Wamp root directory in the WWW folder to run successfully. At the same time Wamp to be in the running state. Open without a site mode:Enter: localhost/file name in the URL field 1 code

A simple factory model is a factory object (Factory) that determines which product class instances are created.Requirements: Simulate a calculator classFirst, define an abstract operator class1 PackageCom.sun.FactoryMethod;2 3 Public Abstract

14th Chapter PreprocessorI skipped the advanced Pointers topic chapters.Too much skill, too much discipline is not suitable for me today. But I really read and read. Let's say who reads privately and can communicate. Some tips are still very

I. What is table partitioning?In general, table partitioning refers to dividing a large table into several small tables based on conditions. Mysql5.1 began to support data table partitioning. For example, if the number of records in a user table

1. Partition column index constraintsIf the table has a primary key or unique key, the partition column of the partition table must be included in the primary key or unique key list to ensure the efficiency of the primary key, otherwise, the same

How to automatically load class files! Currently, autoload (the code is as follows:) is there any other way to automatically load class files? Except include (specific file path) PHPcodefunction _ autoload ($ className) {if (file_exists (model. $

In the "signals and slots of the Qt Quick event Processing", we describe how to use the built-in types of signals in QML and how to define the signals themselves, this time we look at how to deal with the mouse, keyboard, timer and other events.

1.If statementsScala's If statement can complete the IF statement in other languages, at the same time, if/else usually has values that can be used to assign values, or instead of the ternary conditional operator (?:). However, it can be more

1. Do not copy variables randomly Sometimes in order to make the PHP code more neat, some novice PHP (including me) will copy the predefined variables into a shorter name of the variable, in fact, the result is an increase in memory consumption,

How to load class files automatically! Now with AutoLoad (code as follows:), is there any other way to load the class file automatically? In addition to include (Specific file path) PHP Code function __autoload ($className) {if

I. Basic Shell syntax1. VariablesBy convention, Shell variables are composed of uppercase letters and underscores (_). There are two types of Shell variables:Environment VariableEnvironment variables can be transmitted from the parent process to the

method One: or: This enables multiple buttons to be sent to different Web pages. method Two: When the form is submitted, the action inside cannot take parameters, for example: in this way, test.do cannot read args and must be replaced by the

Problem description: a conversion from the double type to the int type Detailed Description: In the class, our web teacher used C # to relearn a small program for C Language Learning-a given score with a program to determine the level. C language

  Windows X. h header file: (all files are checked online)Http://www.codeproject.com/win32/msgcrackwizard.asp Part 1:Introduction:Windows X. H header files provide convenience for W32SDK programmers (tools ?)Many junior and intermediate programmers

From: http://blog.csdn.net/ydbcsdn/article/details/1804096 Casyncsocket multi-thread Environment Windows Network Programming Asynchronous selection model is essentially different from normal selection model. This model uses Windows window message