Add an EAV model to a database
Tutorial address
Http://magentobbs.com /? Q = content/% E6 % B7 % BB % E5 % 8A % A0 % E5 % AE % 9e % E4 % BD % 93% E7 % B1 %
Bb % E5 % 9e % 8b
Principles of the EAV model:
Product table ---- (entity_type_id) ----> Attribute Table ----- (attribute_id) -----> value table
In the above relationship,
Install Database
1
Set entitytype mainly to set values required during the ins
The official version of ESET 5 is officially released. The latest version of ESET 5 includesESET Smart SecurityCompared with the ESET NOD32 antivirus version, ESET 4 has made significant improvements. The following is a 32/64-bit official version for Chinese and English: New Features of ESET 5:
In addition to improving the existing features, the latest version of ESET 5 also adds the following features:
ESET cloud-Powered reputationCloud technology optimizes and updates databases in real time
From waiting for s blog
ESET anti-virus software has always been known for its low resource usage and low CPU consumption. However, many friends (especially friends in mainland China) have responded that ESS EAV has serious intermittent CPU usage.In fact, the CPU usage of ESS EAV is very serious. The vast majority of them are high CPU usage of ekrn processes, and most of them use thunder or similar downlo
Magento the product information in the Sub-table, the topmost table is catalog_product_entity, contains only the product information (SKU)//table Eav_attribute, this table in Magento for all the different entities stored all the attributes// Note entity_type_id, each entity has entity_type_id. The record values in Catalog_product_entity are 10//the ID values of all entity entities stored in the Eav_entity_type table//eav_attribute_set the values of all attribute sets stored in the table//magento
another stored procedure can be calledOriginally wanted to write in method three: DROP PROCEDURE IF EXISTS sp_count (); This is wrong. Debugging when the wrong write, can only be manually deleted, and did not find a good method.Resources:
Relive sql--row to column, make a career change
SQL statement for database row to column
2013-8-8 Update:Method Two can also use the IF statement.As shown below:
12345
SELECT name,SUM(IF (course = ‘语文‘ , score , null )
Determine whether the device is a mobile phone device in various languages, and determine whether the device is a mobile phone device in different languages.
This website is used in various languages to determine whether it is a mobile phone device.
Http://detectmobilebrows
Linux Equipment ClassificationThe devices under Linux are usually divided into three categories, character devices, block devices, and network devices.Character deviceA character device is a byte throttle device, access to the device can only be accessed sequentially in bytes, not random access, the character device do
WIN8 System open Device Manager appears umdf HID minidriver device unknown device How to deal with? after installing the WIN8 operating system, open the Setup Manager to check whether the driver is intact, open Device Manager but found an unknown device "Umdf HID minidriver
One. Related basic knowledgeXiaomi Note Parameter view: http://www.mi.com/minote/specs/The following is an example of millet note this device.1. It is generally said that the number of inches of mobile phone refers to: the length of the screen diagonal. 1 inches 2.54 cm. The millet note is 5.7 inches and is about 14.478 cm.2. Physical pixel/device pixel/pixel: In a very not rigorous way to the popular expla
Reference Address: http://blog.chinaunix.net/uid-26322998-id-2981874.html1, Block equipmentDevices in the system that can randomly (and do not need to sequentially) access fixed-size data slices (chunks) are called block devices, which are called blocks. The most common block devices are hard disks, and in addition, there are many other block devices, such as floppy drives, CD-ROM drives, flash memory, and so on. Note that they are all used in a way that installs the file system -a common way fo
In the build process of the Linux platform Oracle RAC, if you use Asm+raw storage, because ASM does not support block devices and supports character access devices, you need to configure the conversion of block device drive to character device How drive is accessed.But in the Linux platform, unlike Aix and HP-UX, the default is to provide a block device correspon
ZZ from http://blog.csdn.net/fudan_abc/archive/2007/06/23/1662739.aspx
By the way, record this blog: the Linux USB driver development of Mingyue may be available in the future.
The three important concepts of the Linux device model are bus, device, and driver. that is, bus, device, driver. In fact, the kernel also defines such data structures. They are str
Failure phenomenon:
Umdf HID MiniDriver Device unknown device appears in Device Manager under Windows 8 system, as shown in figure:
Reason Analysis:
Umdf is the User-mode Driver framework (user-mode driver architecture, referred to as UMDF), UMDF provides plug-in (PNP), Power Manager, asynchronous output input functions, Umdf HID MiniDriver
devices in the Linux kernelFor the connection on the specific bus external devices have a struct device corresponding, such as platform equipment has platform_device corresponding to it, which platform_device structure is as follows: struct Platform_device {
const char * name; Device name to match the name of the driver and, if successful, into the driven probe function
int id;
struct
I forgot a very simple C code from where I found it a long time ago, completed the character device registration, automatically obtained the device number (Master/Slave), and automatically created the device node.
I have posted some similar questions for your reference.
Thanks to the original author of the Code: zengxiaolong
The following code is compiled in the
Deploy Windows Mobile 6.5 when connecting devices todaySmartphone ApplicationProgramThis error occurs. "The device security configuration does not allow connection. Make sure that you have the appropriate certificate for the device you are developing. For the correct security settings for connecting to this deviceAn error occurred while checking the SDK documentation. There are two solutions:1. Run the foll
"Problem description"When you make a manual backup of system management, you are prompted to "fail to open Backup device" E:\ automatic backup \ufidau8xtmp\ufdata. BAK '. An error occurred on the device or the device is offline. For more information, see the SQL Server error log. -2147217900 "Then click "OK" will prompt a suggestion "1, check the hint path of the
/********************
* Character device driver
********************/
(1) Character device driver Introduction
A character device is a device that is accessed by a byte stream and is called a character device driver for a character de
Original URL: http://www.cnblogs.com/geneil/archive/2011/12/03/2272869.htmlfirst, the Linux system divides the device into 3 categories: Character device, block device, network device. Using drivers:1, character device : Refers to a byte can only one byte read and write devi
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