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ERROR 1062 (23000): Duplicate entry ' 0 ' for key ' PRIMARY '

Os:centos 6.3db:5.5.14Test Create Yoon Test table, no primary key, no index, the underlying data content is as follows:Mysql> select * from Yoon;+----+----------+------+| ID | name | user |+----+----------+------+| 1 | \ "" ##!aa | NULL || 2 | Z2 | NULL || 3 | Z3 | NULL || 4 | Z4 | NULL || 5 | Z5 | NULL |+----+----------+------+5 rows in Set (0.00 sec)The Test uses a command to set the ID to the self-increment primary key, the command ALTER TABLE YO

IE11 for Windows 7 Enterprise with SP1 failure

: Qqdownload IE left HelperPublished by: Tencent Technology (Shenzhen) company LimitedType: Browser Helper ObjectArchitecture: 32-bitVersion: 4.2.745.401File Date: 2013? Year 3? 28??? 15:37Last access date: 2014? 6 months? 9??? 16:00Class ID: {00000000-12C9-4305-82F9-43058F20E8D2}Usage Count: 538Block Count: 13Files: QQIEHelper01.dllFolder: C:\Program Files\xuanfengName: Send to OneNote (N)Published by: Not availableType: Browser extensionArchitecture: 32-bit and 64-bitVersion: Not availableFile

The de-weight of the Python list

author's ideas to solve the following problems.#需求: Counts the number of occurrences of an element for lis = [2,3,5,3,2,4,8,5,6,7,5].Lis = [2,3,5,3,2,4,8,5,6,7,5]# de -lis1 == {} for in Lis1: # count print(DIC)#需求如下: Give a list of shopping carts and count the results of the list output"""Goods = [{"Name": "Computer", "Price": 1999}, {"Name": "Logitech Mouse", "Price": 10}, {"Name": "Yacht", "Price": 20}, {"Name": "Beauty",

Neural network-Fully connected layer (1) _ Neural network

, it finally looks less like a step, and the non-linear ability of the 2-layer neural network begins to appear. The weight is given to the random Emperor: FC = FC (2) FC2 = FC (1) Z1 = Np.array ([Fc.forward (d) for D-in data]) Z2 = Np.array ([Fc2.forward (d) For d in Z1]) Z2 = Z2.reshape ((100,100)) draw3d (X, Y, Z2, (75,80)) Image above: This time the nonlinearity is very obvious, but there seems to be a small problem, that is, the function seems to be the origin of the "Central symmetry" di

Analysis of MySQL Partition Table Technology

statistics and index selection.Mysql> explain partitions select * FROMRPT_MALEVENTS WHERE RECORD_DATETIME> '2017-08-12 'AND RECORD_DATETIME * *************************** 1. row ***************************Id: 1Select_type: SIMPLETable: RPT_MALEVENTSPartitions: p2011, p20110809, p20151110, p20151111, p201201712, p201511201713, p20151114, p201201715, p2011 [z3] 0816, p201201717, p201201718, pMaxType: rangePossible_keys: RECORD_DATETIMEKey: RECORD_DATETIMEKey_len: 8Ref: NULLRows: 355911 [z4]Extra:

Lenovo Mobile Association Lenovo China, into Liu June wisdom Lenovo strategic important battle Force!

June 5, Lenovo held in Beijing Lenovo Z5 New National flagship conference, officially released Lenovo Z5, Lenovo K5 Note, Lenovo A5, Lenovo Watchⅹ, particle mineral cloud and other new products.This is Lenovo Mobile business Group (MBG) China business after joining Lenovo China's first launch, Lenovo Group executive vice president and China president Liu June and Lenovo Group vice president, Lenovo China Mo

Create custom components for windowsxpembedded

deviceUsing the above tools to determine which files and registry keys are needed is only part of the puzzle. After the Windows XP embedded image has been generated, the application will also need to be tested to ensure that it can work as expected-the application may dynamically load the DLL or create an instance of the COM object, however, you cannot use dumpbin or depends to capture the information. Therefore, some debugging tools are required on the target device. The following is a list of

What is the mouse refresh rate?

movement. Refresh rate performance indicators are often ignored by consumers, because the refresh rate is also known as the sampling frequency, many friends will be the sampling frequency and defined as the sampling rate of the DPI value of the muddy Xiao. Refresh rate in the application also occupies a very important position, for example, the mouse quickly move a distance, if the mouse's refresh rate is less than the moving distance within the image data, the mouse scan of the image data will

What is the mouse refresh rate

the mouse movement. Refresh rate performance indicators are often ignored by consumers, because the refresh rate is also known as the sampling frequency, many friends will be the sampling frequency and defined as the sampling rate of the DPI value of the muddy Xiao. Refresh rate in the application also occupies a very important position, for example, the mouse quickly move a distance, if the mouse's refresh rate is less than the moving distance within the image data, the mouse scan of the image

MySQL Basics 5-conditional filtering and sorting

1. Queries with restricted conditionsThe most common is to use the WHERE clause to specify the query criteria to filter the dataChestnut 1: Check the dir_id=4 of all goodsSELECT *From productWHERE dir_id=4;Chestnut 2: Enquiry for all goods with a retail price of 119Chestnut 3: find information about all products in the Logitech G9x product nameNote: strings and dates are enclosed in single quotation marks.Chestnut 4: Check the product name is not for

JS play a Play

();}function Zong10 () {ZZ = "Record Search";Dadajuan ();}function Zong11 () {ZZ = "Game";Dadajuan ();}function Zong12 () {ZZ = "recent video";Dadajuan ();}var i = 0;var Shuzu = new Array ();var x = 0;function Dadajuan () {if (iShuzu[i] = ZZ;var Kaiguan = 1;if (i!=0) {for (var j = 0;jvar Cao = shuzu[j];if (Cao = = zz) {Kaiguan = 2;x = j;}}}if (Kaiguan = = 1) {Bianse ();switch (i) {Case 0:$ ("#z0"). HTML (ZZ);$ ("#z0"). CSS ({"Border-bottom": "Sandybrown Solid 2px"});BreakCase 1:$ ("#z1"). HTML

Linux Disable Touchpad

1, first you need to view the touchpad:Command: XInput listResults:? Virtual core pointer id=2 [master pointer (3)]? ? Virtual core XTEST pointer id=4 [slave pointer (2)]? ? Macintosh mouse button emulation id=14 [slave pointer (2)]? ? USB OPTICAL MOUSE id=15 [slave pointer (2)]? ? IMPS/2 Logitech Wheel Mouse id=13 [slave pointer (2)]? Virtual core keyboard id=3 [Master keyboard (2)]? Virtual Core XTEST keyboard id=5 [slave keyboard (3)]? At translate

MySQL partition table technical analysis _ MySQL

indicates that MySQL estimates the number of rows to be read based on the table Statistics and index selection. Mysql> explain partitions select * FROMRPT_MALEVENTS WHERE RECORD_DATETIME> '2017-08-12 'AND RECORD_DATETIME * *************************** 1. row ***************************Id: 1Select_type: SIMPLETable: RPT_MALEVENTSPartitions: p2011, p20110809, p20151110, p20151111, p201201712, p201511201713, p20151114, p201201715, p2011 [z3] 0816, p201201717, p201201718, pMaxType: rangePossible_ke

SQL statements (exercises)

price between 300-400SELECT Id,productname,saleprice from Product WHERE saleprice between and 400;#需求: Select ID, item name, goods with a retail price not between 300-400SELECT Id,productname,saleprice from product WHERE Saleprice not between and 400;#需求: Select ID, item name, all items with category number 2 or 4SELECT id,productname,dir_id from Product WHERE dir_id in (2 OR 4);#需求: Select ID, item name, all items with a category number not 2 or 4SELECT id,productname,dir_id from product WHERE

Far away from us? Test the actual use of NFC.

For a long time, when we mention NFC, there will always be a mindset-it is useless in China. Indeed, one major purpose of NFC is mobile payment, which is rare in China. Recently, China's high-end mobile phone ZTE Nubia z5 and idea mingyang dg90 have all added relatively rare NFC functions and provided corresponding NFC tags. On these mobile phones, what is the role of NFC? Does this mean that NFC will become the standard for mobile phones in the futur

2014 Latest Computer Configuration recommended home/game configuration

Asus 760¥2200) Hard drive: Seagate 2tb¥580 (SSD added) Chassis: Jayne Little Phantom or h2¥480 Power supply: Sea rhyme s12ii520¥440 (optional titanium ECO520 need to buy video card 6PIN switch wiring ¥460) Mouse: Razer Purgatory Viper ¥300 (alternative Logitech G400¥230) Keyboard: Self-study of mechanical keyboard Display: dell-2412m¥1500   Tyrants level Configurationcpu:i5-3570k¥1610 Heat dissipation: Kyushu ¥200 of Frost Tower (alternative

Mouse DarkField Technology

Recently, my Logitech mouse broke down after it expired, and it was very depressing. My master recently bought a very good Logitech mouse m905. At that time, he showed me how to use the mouse on the glass, which surprised me. Although the function is strong, the price is also frightening. For these reasons, I am interested in the mouse, especially the latest Logitech

OS X system gesture ultimate setting method + bettertouchtool detailed setting of Chinese Translation

I believe that those who have used the Logitech g mouse have been impressed by the powerful user-defined function of the Logitech mouse. For those who simply want to use the three-Key mouse while pursuing complicated denial functions, I doubt whether they really understand the significance of the Multi-Key mouse or gesture function for the convenience of computer operations. Copying and pasting, moving forw

How to judge the quality of the mouse

Now can be seen in the market the mouse is mainly photoelectric mouse and mechanical mouse, and we generally use the mechanical mouse, but the photoelectric mouse to replace the mechanical mouse is imperative, so here is no longer said, because for the mechanical mouse, the accuracy of the improvement range is limited. So if you are a game enthusiast, but also plan to buy a new mouse, we suggest you buy photoelectric mouse. The photoelectric mouse has its congenital advantage, the delay time, t

Can 4K mobile phone save Sony mobile phone?

650) this.width=650; "class=" AlignCenter size-full wp-image-5981 "alt=" Picture 1 "src=" http://www.kjxfx.com/wp-content/ Uploads/2015/09/2015-09-1584.jpg "Width=" 510 "height=" 374 "style=" height:auto;vertical-align:middle;border:0px; margin:0px auto; "/>How much the screen resolution of a smartphone is the limit is always a contentious issue in the industry. From low-resolution all the way, until the iphone 4 is equipped with a Retina screen, the industry has a more unified cognition: the sc

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