auto reflections

MYSQL obtains the auto-incrementing primary key. [four methods] After we perform the insert operation on mysql in the application, we need to obtain the auto-incrementing primary key of the insert record. This article introduces four methods in the java environment to obtain the value of the primary key auto_increment of the record after insert: using the insertRow () method provided by JDBC3.0 through getG

Oracle does not have a convenient auto-incrementing SEQUENCE in sqlserver. If you want to achieve that effect in sqlserver, it is not very troublesome. You need to create an auto-incrementing SEQUENCE, Oracle does not have a convenient auto-incrementing SEQUENCE in sqlserver. If you want to achieve that effect in sqlserver, it is not very troublesome. You need to

In many business scenarios, the user's access, peak time is difficult to predict, especially when doing some marketing campaigns and promotions, exactly what size of the Web cluster deployment is appropriate, this has been a problem, the deployment of excessive will cause high costs and unnecessary waste of resources, deployment too little, if the peak, too late to deploy, Easy to create user access, poor user experience, loss of trade, and so on, of course, not to mention the operation and main

In many business scenarios, the user's access, peak time is difficult to predict, especially when doing some marketing campaigns and promotions, exactly what size of the Web cluster deployment is appropriate, this has been a problem, the deployment of excessive will cause high costs and unnecessary waste of resources, deployment too little, if the peak, too late to deploy, Easy to create user access, poor user experience, loss of trade, and so on, of course, not to mention the operation and main

PHP Namespaces and Auto-load classes, PHP namespace loading classes PHP's namespace (namespace) is only available after php5.3. This concept is already very early in C #, and the namespace in PHP is actually the same as the C # concept. Why should I use namespace in PHP? Assuming that you do not use namespace, the name of each class in a project must be fixed. Because PHP has a file that corresponds to a class name, whether it's calling AutoLoad or c

The previous introduction of Docker's stand-alone installation, multi-host network interoperability, how to semi-automated update and rollback code, now describes how to cluster and auto scale.Trunking Communication SoftwareThis feature is written in the Python language and is based on TCP sockets and SSL encrypted communication. Let's look at the effect show:To view all node information:650) this.width=650; "src=" http://s3.51cto.com/wyfs02/M00/71/E4

__autoload function themselves. After the PHP5.1.2 version, you can use the Spl_autoload_register function to customize the auto-load handler function. When this function is not called, the SPL custom spl_autoload function is used by default. 1. __autoload Example: function __autoload ($class _name) {Echo ' __autload class: ', $class _name, '';}New Demo ();The above code will be output at the end: __autload Class:demo.And after this error shows: Fata

1. register an account goAws.amazon.com/ec2 and click sign up for Amazon ec2. 2. Download the command line tool download the command-line tools fromAuto scaling tools. 3. Set the Java path and auto scaling path, if Java is not installed, You need to first install, http://www.java.com/en/download/index.jsp Export Path = $ path: $ java_home/binExport aws_auto_scaling_home =/home/admin/AutoScaling-1.0.33.1Export Path = $ path: $ aws_auto_scaling_home/bin

The keyword auto comes from the C ++ 98 standard. In C ++ 98, it does not play any role. In C ++ 0x, "borrow" it as an automatic type deduction (automatic type deduction ). When auto appears in the declaration, it indicates "Please use initializing my expression type as my type ". For example, the following code: C:/temp> type autocat. cpp # Include # Include # Include # Include # Include UsingNamespace

CSS layout, fixed on the right, adaptive width on the left Div Style = "Width: 90%; margin: 0 auto; overflow: auto; _ display: inline-block ;" > Div Style = "Width: 200px; float: Right; Background: #090" > This is the content on the right Div > Div Style = "Margin-Right: 210px; Background: # f33" > This is the content on the left, adaptive width Div >

Today, I encountered the following problem when studying SQL Server 2005: In the exercise, I created a table "person" with five fields, set the ID to the primary key, and set it to auto-increment, Fig GIF(9.33 K) 2/1/2009 3:49:03 pm After data is inserted for multiple times, the auto-increment ID is chaotic, and after the data is deleted, the auto-increment I

Research on MySQL auto-growth primary key and MySQL growth primary key The keyword used for automatic MySQL growth isAUTO_INCREMENTBecause it is DDL, It is case insensitive. Columns used must be defined as keys, such as primary keys and unique keys. The database used in this article is MariaDB 5.5.5 The default transaction isolation sector is the REPEATABLE-READ The client is the HeidiSQL installed with MariaDB for Windows. Community Free Ve