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Mysql field type summary --- field type summary table original Web site: http://kimbriggs.com/computers/computer-notes/mysql-notes/mysql-data-types-50.file Type {storage} Name Range Attributes Default Numeric{1 byte}

The COALESCE function returns the first non-null value from a list of values and replaces it with 0 when it encounters a null value. COALESCE (Str1,str2 ...);e.g. All employees who are lower than the ' WARD ' Commission (COMM) are required to be

Mysql field type source Web site: http://kimbriggs.com/computers/computer-notes/mysql-notes/mysql-data-types-50.file Type {storage} Name Range Attributes Default Numeric{1 byte} TINYINT [(M)] -From 128 TO 127[0

1. Convert GBK to utf8 String gbktoutf8 (const STD: string & strgbk){String stroututf8 = "";Wchar * str1;Int n = multibytetowidechar (cp_acp, 0, strgbk. c_str (),-1, null, 0 );Str1 = new wchar [N];Multibytetowidechar (cp_acp, 0, strgbk. c_str (),-1,

Address: http://blog.sina.com.cn/s/blog_6215c3760100fc2s.html Kerneliocontrol is an undisclosed function. Therefore, we need to declare that many undisclosed methods are used in the following example. Therefore, we need to declare them before use: #

During installation, UTF-8 is selected, and the database used is mysql5.0.27 -- mysql5 User Creation (log on to the default superuser when installing) Grant all privileges on *. * To 'ailf' @ 'localhost' identified by 'ailf' with grant option; Grant

Text: C language under multithreading"Problem" created 10 threads, 10 threads common to a thread body, created as follows:intt1=0,t2=1,t3=2,t4=3,t5=4,t6=5,t7=6,t8=7,t9=8,t10=9; int*one=&t1,*two=&t2,*three=&t3,*four= &t4,*five=&t5,*six=&t6,*seven=&t7,

Because the date types in Oracle are found in Oracle---->MYSQL data Migration, the corresponding MySQL time types are incorrectly set to cause errors, especially when there is a null valueMySQL version 5.6.40 versionmysql> desc T1;+-------------+-

Decode is actually if-else, such as decode (ybc, null, 0, ybc). This means that if the ybc column is null, the function returns 0; otherwise, the function returns ybc. Another example is decode (variable, condition, condition). This means: if-elsif.

I. What is ICC?The IoC (inversion of control, controlled inversion) is also known as "Dependency Injection" (dependence injection,di).Control inversion is the right to create an object that is controlled by the developer and moved to the

who is the undercover game believe that everyone has played or seen, written in the game is nothing more than the socket message, sent to send, the main message is the time to send the logic to be able to become a fun little game: Login interface

Note:1. The host referred to in all HTTP requests below is f.10086.cn2, currently only China Mobile users can use1. Open login page: get/huc/user/space/login.do?m=submit&fr=space, get two cookie values: Jsessionid and UUID2, Login:

Event objectThe time object also belongs to the kernel object, which contains a count, a Boolean value indicating whether the event is an automatic reset event or a manual reset event, another Boolean value indicating whether the event is in the

Multithreading in the programming has a very important position, we in the actual development or job interview can always encounter multi-threading problem, the degree of understanding of multithreading from a side reflects the programmer's

Reprinted: http://blog.csdn.net/segen_jaa/article/details/6447874 // Convert utf8 to GBK format Void convertutf8togbk (cstring & strutf8){Int Len = multibytetowidechar (cp_utf8, 0, (lpctstr) strutf8,-1, null, 0 );Wchar_t * wszgbk = new wchar_t [Len];

Recently used Discuz to build a Web site-Child Safety Seat Network (www.bbseat.com.cn), with the portal function, have to say Discuz function is very powerful, but in the use of the process found in the article added when the picture is not like

Windows_37_thread_interlock Thread-Atomic lock // windows_37_Thread_InterLock.cpp : 定义控制台应用程序的入口点。 // #include "stdafx.h" #include "windows.h" long g_nValue1 = 0; long g_nValue2 = 0; DWORD WINAPI InterProc1(

In-depth understanding of ini configuration in php (1)This article does not describe the purpose of an ini configuration item in detail. These are all covered in the manual. I just want to explore the implementation mechanism of php from a specific

This article does not describe the purpose of an INI configuration item in detail, as explained in the manual. I just want to dig into PHP's implementation mechanism from a specific point of view, which involves some knowledge of the PHP kernel:-)

Create a thread's functionHANDLE CreateThread ( // SD size_t dwstacksize, / / initial stack Size lpthread_start_routine lpstartaddress, // thread function lpvoid Lpparameter, // thread