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the unsigned range is 0 to 16777215.int[(M)] [UNSIGNED] [Zerofill]A normal size integer. The signed range is 2147483648 to 2147483647, and the unsigned range is 0 to 4294967295.integer[(M)] [UNSIGNED] [Zerofill]This is a synonym for int.bigint[(M)] [UNSIGNED] [Zerofill]A large integer. The signed range is 9223372036854775808 to 9223372036854775807, and the unsigned range is 0 to18446744073709551615.I see!That's why other online invalid query:duplicate entry ' 32767′for

Insert on Dumplicate Update when the primary key is the same update, the contents of the update change to 1 Multiple contents of update are separated by commas ... And notmysql> insert INTO ' 200702 ' (' Domain ', ' 2nd_domain ', ' TLD ', ' query_ns1 ', ' query_ns2 ', ' report_date ') VALUES (' DNSPOD.C Om ', ' dnspod ', ' com ', 1000, Watts, ' 2007-02-04 ') on DUPLICATE

Label:first, Getting started with SQL statements1. SQL statements are statements that are specific to the DBMS "talk", and the SQL syntax is recognized by different DBMS.2. The string in the SQL statement is enclosed in single quotation marks.3. SQL statements are insensitive to the case of SQL keywords and are case-sensitive for string values.4. Create TABLE, delete table not only can be done by hand, can also execute SQL statement completion, in automation deployment, data import with many, cr

Today, using NAVCAT to add foreign keys to a table error:You have a error in your SQL syntax; Check the manual-corresponds to your MySQL server version for the right syntax-use-near ' Type=innodb ' on line 1After troubleshooting, it was discovered that the types of the two tables were not the same:Sql:show Table Status Query the state of the data table, engine that column isTo modify a table type using a statement: ALTER table ' cms_channel ' ENGINE = INNODB;Problem solving======================

Label:1.1.1 FOREIGN KEY constraintCreate database day16; Use DAY16; To create a departmental table: CREATE TABLE Dept ( did int primary key auto_increment, Dname varchar (20) ); INSERT INTO dept values (NULL, ' development department '); INSERT INTO dept values (NULL, ' Research Department '); INSERT INTO dept values (NULL, ' marketing department '); Create an employee table: CREATE TABLE EMP ( Eid int prim

Sharp jQuery key points (1) jQuery selector. For more information about jquery learning, see. 1. Basic Selector $ (# Id) Matches an element based on the given id. $ (. Class) Matches the element based on the given class name. $ (Element) Match an element based on the given element name $ (*) Match All elements $ (Selector1, selector2,..., selectorN) Returns

1. Box modelWhen CSS processes Web content, each element is "placed" in a box, the so-called box model.The box model consists of 4 parts: content, padding (padding), border (border) and margin (margin)Show the contents of the whole box model, how about it? It's simple. If you think it's simple, that's a big mistake!!There is a hole in the box model where the height and width of the element are taken, and the high and wide properties can be specified i

1. Introduction With the increasing demand for mobile communication systems, currently, 2G, 2G, and 2G systems and 3G systems that have been put into commercial use cannot meet the increasing high-speed multimedia data business needs of modern mobile communication systems, many countries have invested in the research and development of 4G mobile communication systems. This article will briefly introduce the main technical features of 4G mobile commun

I changed the int type of ID to bigint, in fact, it may be better to change back. It is possible that an error occurred while backing up the database. The development of the Web site backend system in the test process, this problem occurs: Invalid query:duplicate entry ' 127′for key 1 SQL is:insert into ' kq_news ' (' Title ', ' Author ', ' Type ', ' Content ', ' Isdel ', ' adate ', ' Range ', ' Lang ') VA

Create an Apache VM in Gentoo This tutorial describes additional settings for the LAMP environment, such as creating a VM on Apache, generating an SSL Certificate file and key, enabling the secure SSL protocol for HTTP transactions, and using the Apache CGI gateway, then you can run the Perl script or Bash script on your website. Step 2: Create an Apache VM This topic uses a fake Domain Name: gentoo. lan, enabled through local host files, website fil

)Memory m main Memory (memory)Connection between 2.CPU and main memory via system busIV. Organizational forms of main memory1. Address: Each storage unit corresponding to the number, generally starting from 0 (below is 0)2. Content: Information stored in the storage unit3. The main memory is stored in the computer needs to use the program and dataFive, the concept of stored proceduresThe program and data required by the computer are entered into the memory by the input device,The controller send

Run: Unit unit1; interfaceuses windows, messages, sysutils, variants, classes, graphics, controls, forms, dialogs, stdctrls, comctrls; Type tform1 = Class (tform) hotkey1: thotkey; memo1: tmemo; checkbox1: tcheckbox; checkbox2: tcheckbox; checkbox3: tcheckbox; checkbox4: tcheckbox; Procedure destroy (Sender: tobject); end; var form1: tform1; implementation {$ R *. DFM} procedure merge (Sender: tobject); begin hotkey1.modifiers: = []; If checkbox1.checked then failed: = hotkey1.modifi

Analysis of the six key technologies of MFC (Part 1) -- the initialization process of the MFC Program Http://blog.csdn.net/liyi268/archive/2005/02/22/297875.aspx Analysis of the six key technologies of MFC (Part 2) -- runtime type recognition (rtti) Http://blog.csdn.net/liyi268/archive/2005/02/27/304175.aspx Six key te

VPs has been around for a long time. I just encountered importing a database during the WordPress migration process. Met #1062-duplicate entry '1' for key 'primary' At that time, I was so anxious that I had deleted all the original data and could not only request the omnipotent Baidu. I finally found it for me for a long time. Excited ing, test now, O (lead _ Wait) O Haha ~ Succeeded. Now we have at

Operating Environment:Operating system: Win7 64-bitPython version: 2.7.12Ide:pycharm 2017.2Test code:Test Python dict 1 and True as a key valueThe test demo is as follows:#!/usr/bin/env python"Liukang"Dict_test = {}Print Dict_testdict_test[1Print Dict_testdict_test[TruePrint Dict_testThe results appear as follows:As can be seen, first we create a new dict:{1:

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-------------------------------------MyEclipse shortcut key 1 (CTRL)-------------------------------------Ctrl+1 Quick FixCtrl+d: Delete When moving forwardCtrl+q positioning to the last edited placeCtrl+l positioning in a rowCtrl+o Quick Display OutLineCtrl+t quickly displays the inheritance structure of the current classCtrl+w Closing the current editerCtrl+k qu

Asp. NET and ASP. HttpApplication request processing pipelines have common parts and differences, this series will experience the 19 key aspects of the ASP. Web MVC request processing pipeline life cycle. ① take IIS6.0 as an example, the first is to maintain a working process by w3wp.exe ② If this is the first time loading, the. NET runtime is loaded by Aspnet_isapi.dll ③ A worker process has an application pool, which can host more than one applic

Label:Select User_sequence.nextval Form DualThe above attributes describe:keyproperty= "id": a property in a classOrder: Build Policy: (insert into before or after execution): default is After executionSequence in the User_sequence:oracleTo create a sequence:Create sequence User_sequenceStart with 1Increment by 1NomaxvalueMinValue 1NocycleCache 10;MyBatis (Oracle) How to use the primary key automatically plus 1