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The purpose of writing this essay is to clarify some of the facts and opinions in my previous article "abandon the auto-increment ID of the database and expose the solution I used". At the same time, I will continue to answer the concurrent questions, I will use the lock on the original stored procedure to solve the problem and attach my test code and test data. The reason why I put it on the homepage does not mean that I have a lot of skills and expe

[PHP] MySQL obtains the primary key (auto-increment ID) and mysql primary key of the inserted data. To prevent primary key conflicts, auto-increment (auto_increment type) fields are often used in DB Design. Therefore, the primary key of the modified record is often unknown before data is inserted. To facilitate subsequent or cascade queries, we need to obtain the primary key automatically generated by the

Mybatis implements the oracle primary key auto-increment mechanism tutorial, mybatisoracle How to Implement oracle primary key auto-increment using mybatis First, let's look at how to create primary keys for the same student table, mysql, SQL server, and oracle. In mysql [SQL] view plain copy Create table Student ( Student_ID int (6) not null primary key AUTO_INCREMENT, Student_Name varchar (10) not null,

-What is auto? +auto is self-adapting, auto is the default value for many dimension values, which is calculated automatically by the browser. + The sum of the margin, border, padding, and content widths of the block-level elements form the parent element width. When the Auto property is used, the width of the parent e

But one morning I found that all my computers could not access the internet. Ping ISA fails. It is normal after restart. I check that there are 3 logs in the system log. Web Proxy logs: 1. The WinHTTP Web Proxy Auto-Discovery Service has been idle for 15 minutes, it will be shut down. 2. The WinHTTP Web Proxy Auto-Discovery Service suspended operation. 3. The WinHTTP Web Proxy

12. After the template file is ready, we use PowerShell to create an auto-expanding collection of VMSS for Linux and first login to the ARM account in Azure China:Login-azurermaccount-environmentname Azurechinacloud650) this.width=650; "Src=" http://images2015.cnblogs.com/blog/845013/201609/845013-20160909120957816-1592234599. PNG "style=" border:0px; "/>13. If you have multiple subscriptions, select the correct subscription you want to create VMSS:Se

http://alorry.blog.163.com/blog/static/6472570820122883822790/Body:The Eclipse Code AutoComplete feature defaults to only the point ".", that is, only the input "." The auto-complete prompt box appears. It is also troublesome to always press "ALT +/" To complete the auto-completion.in fact, simply setting it in Eclipse allows you to enter any and all auto-complet

First look at the following procedure:intarr[1][Ten] = {0,1,2,3,4,5,6,7,8,9}; for(Auto *p = arr;p! = End (arr); p++) {cout"P is"Endl; cout"*p is"Endl;} for(Auto *Q:arr) {cout"Q is"Endl; cout"*q is"Endl;} for(Auto R:arr) {cout"R is"Endl;}The result of the program running isP is int (*) [10]*p is int [10]Q is int **Q is intR is int [10]In C + +, operations on array

The Eclipse Code AutoComplete feature defaults to only the point ".", that is, only the input "." The auto-complete prompt box appears. It is also troublesome to always press "ALT +/" To complete the auto-completion. in fact, simply setting it in Eclipse allows you to enter any and all auto-completion prompt boxes. The setup steps are as follows:Select the Prefer

1. Use MySQL--help to view mysql command parametersAttention--auto-rehash Enable automatic rehashing. One doesn ' t need to use' Rehash ' to get table and field completion, but startupAnd reconnecting may take a longer time. Disable with--disable-auto-rehash.(Defaults to In; Use--skip-auto-rehash to disable.)2. Temporary use# mysql-u Root-p--

automatic configuration (auto-configuration) Automatic configuration (auto-configuration) is one of the most important features of spring boot, because the feature is based on the classpath of the application (this is mainly based on Maven Pom.xml decision), annotations and some other Java configuration descriptors automatically configure the spring boot application. For example, if you configure H2 in your

to be able to access HTTPS on the server that the domain name points to. (you will not find a 443 port error) 2. Requires a Linux environment. Deploy get Let's Encrypt # #获取 wget https://dl.eff.org/certbot-auto # #设置为可执行 chmod a+x Certbot-auto Perform an automated deployment. During the/certbot-auto deployment process Will download a whole bunch of dependent pac

Reprinted on the Internet and configured the auto-increment column. A primary key without a database table is generally set as an auto-increment field. After a record is inserted, how to obtain the ID value of the record: Use the following function: Evaluate () DB2VALUESIDENTITY_VAL_LOCAL () DerbyVALUESIDENTITY_VAL_LOCAL () HSQLDBCALLIDENTITY ( Reprinted on the Internet and configured the

This year, Google launched Android Auto, a car Android, designed to provide entertainment, navigation, and other functions. Android Auto, however, is not the end point, and now news reports that Google is developing a vehicle-mounted Android system that can completely replace the bottom-line control system of the car, which is likely to be announced next year. The current Android

. SURFACE_TYPE_PUSH_BUFFERS); // you can specify the regular surfaceView on the screen. setKeepScreenOn (true); surfaceView. setFocusable (true); releaseCamera (); // obtain SurfaceHoldersurfaceView from SurfaceView. getHolder (). addCallback (surfaceCallback); // Add a callback for SurfaceHolder // surfaceHolder. addCallback (surfaceCallback); surfaceView. getHolder (). setType (SurfaceHolder. SURFACE_TYPE_PUSH_BUFFERS); release camera resources [html] private void releaseCamer A () {// TODO

This article mainly introduces the primary key in MySQL and the usage tutorial for setting auto-increment. it is the basic knowledge in MySQL getting started. if you need it, refer 1. primary key declaration method:You can add a primary key to the table when creating the table, for example: Create table tbl_name ([field description omitted...], primary key (index_col_name )); You can also add a primary key to the table when updating the table structur

MYSQL: how to use the MYSQL command line to automatically complete full-featured bitsCN.com MYSQL: how to use the MYSQL command line auto-completion function Run the MYSQL-I command to view the MYSQL command parameters. the -- auto-rehash parameter is described as follows: -- Auto-rehash Enable automatic rehashing. One doesn' t need to use 'Rehash' to get

table MERS (id int identity (1, 1) primary key not null, name varchar (15 ));Insert into MERS (name) values ('name1'), ('name2 ');Select id from MERS;Note: strings in sqlserver are expanded with single quotation marks, while double quotation marks can be used in mysql.The query result is the same as that of mysql. It can be seen that once the id is set to the identity type, the MS SQLServer database automatically assigns a value to the primary key in ascending mode. Identity contains two parame

General mouse and keyboard hook. Image hijacking. auto start upon startup, mouse and keyboard hook Using System;Using System. Collections. Generic;Using System. IO;Using System. Windows. Forms;Using System. Runtime. InteropServices;Using System. Reflection; Namespace HookTest{/*Note:If the returned value of SetWindowsHookEx is 0 during running, this is because of the. net debugging mode. The specific method is to disable the host process and open the

Long 64bit -2^63--2^63-1 0 Long 7 Float 32bit IEEE 754 0.0f Float 8 Double 64bit IEEE 754 0.0d Double 9 void --- --- --- Void 2.Java automatic packing and unpacking definitionThe automatic boxing and unpacking mechanism is introduced in Java 1.5:(1) Auto-boxing : The basic types are packaged with their