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inventory field is not 0, but null. Then, it is grouped by product number. According to the above conditions, all products can be queried. If the inventory is 0, the inventory is null. SELECTp.*,MIN(s.price) as priceFROMhc_product pLEFT JOIN hc_stock s ON p.productId=s.productId AND s.stockNum>0 and s.effectDay>NOW()group by p.productId PS1: The validity period and product quantity of the query conditions should be written after the connection query, that is, after the ON query. In this way

HISTFILESIZE Maximum number of lines in the command history file IFS Define the Separator Used by SHELL LOGNAME User Login Name MAIL Point to a file whose modification time needs to be monitored by SHELL. After the file is modified, SHELL sends You hava mail to the user MAILCHECK SHELL checks the cycle of the MAIL file, in seconds MAILPATH The function is similar to MAIL, but a group of files can be separated by colons. Eac

canceled. All tabs are replaced by four spaces! How? You do not need to use the tab key during encoding. It is impossible to press four spaces in a row! It brings even worse efficiency! It is impossible to use a unified compiler! What should we do? Yes! When you press a tab, the compiler automatically replaces it with four spaces! So first, set the tab width of all compilers to 4, and the tab is automatically converted to a space. Source Insight Open [Options]-> [compile net Options] And enter

, CAPTION, CIN, CIP, CLIP, CLIPBOARD, CMYK, CMYKA, CUR, CUT, DCM, DCX, DNG, DOT, DPS, DPX, EMF, EPDF, EPI, EPS, EPS2, EPS3, EPSF, EPSI, EPT, EPT2, EPT3, FAX, FITS, FPX, FRACTAL, G, G3, GIF, GIF87, GRADIENT, GRAY, HDF, HISTOGRAM, HTM, HTML, ICB, ICO, ICON, JBG, JBIG, JNG, JP2, JPC, JPEG, JPG, JPX, K, LABEL, M, M2V, MAP, MAT, MATTE, MIFF, MNG, MONO, MPC, MPEG, MPG, MSL, MTV, MVG, NULL, O, OTB, P7, PAL, PALM, PATTERN, PBM, PCD, PCDS, PCL, PCT, PCX, PDB, PDF, PFA, PFB, PGM, PGX, PICON, PICT, PIX, PJ

was going to download the dial. Later I saw a box in the bookstore, which was very convenient. So I bought a large box and hesitated when I bought it, because there is also a gorgeous SUSE10.1 interface you can choose, the price is only one dollar. I finally chose FC5.0 for a very simple reason. I felt uncomfortable with the SUSE cover monster who did not know whether it was a lizard or something. The Style Design of FC is very generous, concise, and very fond. In this way, my FC journey begins

tools Corona SDK is a powerful tool for creating complex games! Look at the attractive games on the official website! I love it! With Corona, you only need a few lines of code to create some refreshing games at a low cost! It owns Libaray, which provides the game's physical engine code. Supported platforms include iOS, Android, Kindle fire, and nook. More than 500 API interfaces are provided. However, it is not cheap to have 199 million knives each year. Unity3d Development language: JavaS

. $ PPID is the ID (pid) of the parent process of the process ). [1] $ PROMPT_COMMAND this variable saves the command to be executed before the main prompt $ PS1 is displayed. $ PS1 this is the main prompt, which can be seen in the command line. $ PS2 second prompt, when you need additional input, you will see it. "> ". the third prompt of $ PS3 is displayed in a select loop (see example 10-29 ). $ PS4 fourth prompt: when you use the-x option to call

in the entertainment field. In a sense, the goal of Collada is to treat every user as a Player, showing them three-dimensional panorama models and interacting with them. There are many application platforms that support COLLADA standards, not only in computer games, but also in web applications, smartphones, Sony's PS3. Among these apps are our common Google Eallh, SketchUp, the old three-dimensional modeling software 3ds Max and Maya, and the Flux p

. Its features can be compared with commercial 3D engines. Ogre (object-oriented Graphics Rendering Engine): ogre is written in C ++ and is field-oriented, flexible 3D engine, it is mainly used for 3D graphics applications that use hardware acceleration. Its Class Library extracts the details of all basic system libraries, such as direct3d and OpenGL, and provides a world-based object and other intuitive class interfaces. Bullet: bullet is a multi-physical library for 3D games that provides the

Experts believe that the Vista operating system is very suitable for playing games, mainly because Vista has the following six powerful tools: 1. Absolute weapon DirectX 10 There is no doubt that DirectX 10's support for Vista provides Vista games to players in a Windows game environment that is beyond imagination, as a result, the primary cause of visual enjoyment exceeded Microsoft's Xbox 360 game host and Sony's PS3 game host. When the dx10 game

be honest, the glsl design is indeed very beautiful, and the API is very clean and clear. However, if we build a new architecture like this, it will be more troublesome for the real-time user. He needs to write a compiler by himself. Otherwise, if the driver is built on the program, it will be almost unnecessary to change the shader compiler, each vendor can use the same one, because the key is to compile the program. In addition, Meta format similar to d3d hlsl fx does not exist. I can do this

To make my spare time professional, I used the PS3 in my house as the svn server for a long time. Article It has been misleading for a long time, and a deposit is kept. If ora core 6 is installed with the server components, SVN should be available. If you are not sure:$ Rpm-Q Subversion In this case, you 'd better add a svn-specific user first:$ Useradd svnroot$ Passwd svnroot Switch to the svnroot user, under the user directory$ Svnadmin cre

features provided by cryengine 2. The cryengine 2 contains the complete built-in cryengine 2 sandbox map editor (including the code and documentation of the engine and development tools ), the R D team provides technical support during the development of your team. The engine supports all video cards and hardware sold on the market, and new hardware will also be supported. Cryengine sandbox: a WYSIWYG editor. Renderer: integrated with indoor and outdoor rendering technology, supports D

After programming for so long, I have not found the most satisfyingCodeEditorNot to mention the big integrated development environment, such as Eclipse, is indeed powerful, but it is too slowI wanted a small one. I used editplus and ultraedit all the time before. editplus was fast and fully functional. Later I gave up ......, Because editplus is not free, and it is not convenient for integration debugging. Then I tried emeditor, crimsoneditor ......I am currently using

Link: http://www.cppblog.com/rise-worlds/archive/2009/04/22/80691.aspxIntroduction: Gamebyro is a mature commercial engine that has been used by many successful commercial projects. It not only includes well-known cross-platform standalone games such as civilization 4, elder brother scroll 4, and radiation 3, but alsoEA's large 3dmmorpg warehouse hammer online. Gamebyro is completely designed based on the face object and has a clear structure for ease of use and expansion. Flexible programmable

are different. DSD music was originally released through SACD (supercd, super cd), and only Sony players can play it. Later, in order to be compatible with normal CD, just mix the normal CD data on a single disk, called hybird SACD. In this way, when a Sony player is inserted, the DSD music is played and the normal CD is inserted, play music with normal CD sound quality. Later, Sony's PS3 was cracked, causing the SACD to be carved out, namely, the

=============== Problem description ==================== About actionbar custom styles... I want to customize the font style of the tab title in the actionbar, which should be added to style. xml Android: actionbartabtextstyle? But it does not actually work. PS1: the background color (Android: background) and font color (Android: titletextstyle) of the title column in the style. xml file are effective. PS2: modifying the tab background color attribute (Android: backgroundstacked) in the styl

performance will be. If you use 30 bones, you can achieve excellent quality on the desktop platform, and also get quite good quality on the mobile platform. Theoretically, the number of bones on mobile platforms should be smaller than 30, and not more than 30 in desktop games. Polygon count The number of polygon used depends on the required quality and your target platform. For mobile devices, if each mesh has 1500-4000 polygon, the results will be better. For desktop platforms, the theoretical

Let's talk about it. The campus navigation system is worth mentioning:1. Level two menu bar, iframe embedded window (style design, with hover effect)2. Gold Map API (custom Basemap style, bounce point, Info form, line navigation)3. Function getElementById () in DOM; (read "JS DOM programming Art")4. Return to the top JS implementationThen a small goal:1. The style of the blog Garden Adjustment, is the front content of the review and contact, after all, for a long time did not see the relevant co

specified, the CD command will turn to that directoryIFS internal field separators, typically space characters, tab characters, and line breaks, are used to divide the fields of words generated by the command substitution, the table in the looping structure, and the read inputLANG is used to determine the locale class for a type that is not explicitly selected with a variable starting with LC_Oldpwd Previous working directoryPath command to search for paths. A list of directories separated by c