Excerpt from: http://stackoverflow.com/questions/5317889/sql-keys-mul-vs-pri-vs-uni/15268888#15268888 SQL keys, MUL vs PRI vs UNI DESCRIBE Acutally a shortcut for: SHOW COLUMNS from In any case, there is three possible values for the "Key" attribute:
Pri
UNI
MUL
The meaning of the PRI and UNI
1. If key is empty, then the column value can be duplicated, indicating that the column has no index, or is a non-leading column of a non-unique composite index2. If key is a PRI, then the column is part of the primary key3. If key is uni, then the column is the first column (the leading column) of a unique value index and must not contain a null value (NULL)4. If key is Mul, the value of the column can be repeated, which is a leading column of a non-
Heterogeneous NetworksIn the process of integration, ZTE is based on the SDR Soft Base Station TechnologyThe Uni-RAN solution is fully qualifiedIt is widely recognized by more operators and has become a mainstream network construction model.
Accelerating multi-network collaboration
The coexistence of 2G/3G/WLAN/LTE and other networks has become a trend. With the introduction of Iot/sensor networks and the development of Smart Cities, multiple heteroge
GCC is the C compiler; g++ is a C + + compiler; The Linux cc is typically a symbolic connection, and the GCC;GCC and g++ are all compilers of the gun (organization). And CC is generally a makefile inside a name, that is, macro definition, hey, because linux/unix are case sensitive system, this must be noted. CC is the C Compiler of Unix systems, while GCC is the
The CC attack (Challenge Collapsar) is a DDoS (distributed denial of service) and is a common site attack method, the attacker through the proxy server or broiler to the victim host constantly send a large number of packets, causing the other server resources exhausted, until the crash.The CC attack (Challenge Collapsar) is a DDoS (distributed denial of service) and is a common site attack method, the attac
NetEase cc Voice How to interactive open Zhuang?
1. Open Quiz
Audience in the room of the host click on "Open Quiz" can be opened, Gold Quiz permission please contact cc:14342022 consultation.
2. Set Quiz theme
Anchor Click on the new theme can open a number of topics, up to 5, the type below can choose to open gold, silver or all.
3. Audience Participation Quiz
(Various companies interview original questions) online has done a set of CC ++ integrated test questions, also to test your level (2), cc integrated test questions
I have read the last 10 questions and sent them to me.
The following is a question, and I have some understanding of the question.
Top 10 question addresses
(Various companies interview original questions) online has done a set of
In fact, since I opened the Gamescene.lua file, one of the things I've been trying to figure out is cc.sprite how these are identified. In fact, the first reaction must be: it must be a global variable, or how to call the Create method. I just want to know when this global variable is registered, how does the C + + class method of cocos bind to Lua?Knowing a bit of LUA knowledge knows that the global variables in LUA will be saved to a global table _g, and the question is converted to when to re
In css definition, we sometimes encounter the definition methods of. AA. CC {} And. AA. CC {}. What are the differences between the two definitions?
CSS definition:. AA. CC {Background-color: yellow;}. AA {Background-color: blue;}. CC {Background-color: red;}
Add the following structure to the webpage:Code, You c
Lightroom and Photoshop are our photography enthusiasts often use two late software, the former easy to manage, later, the latter is suitable for fine repair, many people complain that each use these large software point mouse is very tired, in fact, if you can skillfully use some shortcuts, The combination of keys to quickly pull out the function we can save a lot of time to find the function menu.
What are the advantages of shortcut keys? For example, such as curve adjustment function, in PS,
http://www.adobe.com/support/downloads/detail.jsp?ftpID=5771
Name
Size
Date
Macintosh
Adobe Acrobat 10.1.10 Pro and Standard Update-greek, Arabic, and Hebrew
115MB
6/24/2014
Adobe Acrobat 10.1.9 Pro and Standard Update-greek, Arabic, and Hebrew
115MB
6/24/2014
Adobe Acrobat 10.1.8 Pro and Standard Update-greek, Arabic, and Hebrew
115MB
6/24/2014
Windows
Adobe
Adobe CC Family (CC 2015) Master Edition v5.6#2# # #请彻底卸载旧版后再安装本版! Update Adobe Digital Publishing CC 2016.1Update Adobe Acrobat DC 2015.010.20056 integrated adobe acrobat XI 11.0.14 SPIntegrated Adobe Illustrator CC 2015.2 32-Bit EditionIntegrated Adobe InCopy CC 2015 32-Bi
At such times your statistical system (probably quantum, Baidu, etc.) is not statistically. However, we can use some anti-attack software to achieve, but the effect is sometimes not obvious. Below I provide a section of PHP code, can play a certain anti-CC effect.
Main function: in 3 seconds continuously refresh the page 5 times will point to the native http://127.0.0.1
Copy the Code code as follows:
$P _s_t = $t _array[0] + $t _array[1];$timestamp =
If you do not understand the meaning of tags, you can come in and see www. vpincha. cc and www.zhimeng. vpincha. cc.
Www. vpincha. cc
Tag Name: arclistMark Description: a commonly used mark of zhimeng, also known as a free list mark. imglist, imginfolist, specart, coolart, and autolist are alias tags extended by different attributes defined by the mark.Function D
Le Yangjun Share:
Http://jingyan.baidu.com/album/5225f26b0ec454e6fb09084c.html
Do the site will inevitably encounter hackers attack, especially when the keyword ranking is higher than before, for the sake of competition some people unscrupulous to get others down. When we are personal webmaster, not enough technology and money pillars, there is no way to confrontation with them. But do not watch the day and night hard to optimize the ranking of the keywords dropped. Even will be Baid
Adobe Creative Cloud 2015 downloadAdobe announces Creative Cloud design package updates!New features of Adobe CC 2015 include: –premiere Pro CC 2015: Add a new color space and a new Lumetri color palette, providing a new Toner workflow editor to open Adobe in Premiere Pro cc 2015 software Premiere Clip, which supports creative Cloud Libraries, enhances mobile app
1, Attack principle
The principle of the CC attack is that the attacker controls some hosts to keep sending a large number of packets to the other server, causing the server to run out of resources until downtime crashes. CC is primarily used to attack pages, everyone has this experience: when a Web page visits a very large number of times, open the page is slow, CC
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