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From: http://www.linuxidc.com/Linux/2008-08/15068.htm 1. KeywordsAuto_increment 2. Auto-increment usageExample:Create Table animals (ID mediumint not null auto_increment,Name char (30) not null,Primary Key (ID )); 3. Auto-Increment Q: How to obtain the current maximum auto-increment value? A: Select @ identity Q: How to obtain the current

Collecting in the network, learning the automatic loading mechanism of PHP class, is particularly important in the actual large-scale project.PHP class Auto-loading mechanismIn the process of PHP development, if you want to introduce a class from the outside, you will typically use the include and require methods to include the file that defines the class. This is not a big problem when it comes to small-scale development. However, in large-scale deve

Two, auto shape properties panel This tutorial is object-oriented: A beginner user of Fireworks. The new Auto Shape Properties panel in Fireworks 8 makes us more free to control the automatic Shape object, while making the automatic Shape object more precise by adjusting the detail data. The use of this panel is mainly done in two ways, one is to insert an automatic shape in the edit area directly by cli

the number of ranking of the top 30: 　　 As you can see from the diagram above: Auto House as the most famous car website, its various indicators are higher, and the brand Word search volume is up to 287,696 (including PC and Mobile end), is the second easy car network nearly 6 times times, it can be seen in the brand to create a very successful; Easy car nets Love the number of words, up to 146690, more than

The auto-increment column here mainly refers to the auto-increment of the primary key id in a table. Unlike Mysql, Oracle cannot set the auto-increment column feature when creating a table in CREATE. Else l The auto-increment column here mainly refers to the auto-increment o

of PTC polymer auto-recovery fuses at a certain ambient temperature.Rmin = minimum device resistance at 25 ℃ prior to tripping. The minimum resistance of the device before the mutation at 25 °, which determines the minimum operating current of the polymer auto-recovery fuse. Rmax specifies the highest resistance for the supplied polymer auto-recovery fuse. R1max

Mongodb's auto-increment implementation is similar to that of the root oracle database. postgresql is implemented through counters. oracle Auto-increment implementation: the instance describes oracle sequence usage: postgresql auto-increment implementation :? Postgresqlauto_increment: common method 1. auto_incrementdb.counters.insert (counter table {_ Mongodb's

Reference: www. clusterdb. commysqlreplication-and-auto-failover-made-easy-with-mysql-utilities Environment Introduction: master: demoenv-trial-1slaves: demoenv-trial-2demoenv-trial-31. install PerconaServer on all servers: $ sudoyuminstallht References: http://www.clusterdb.com/mysql/replication-and-auto-failover-made-easy-with-mysql-utilities Environment Introduction: master: demoenv-trial-1 slaves: demoe

Method for resetting the auto-increment start value of various MySQL data table types bitsCN.com Methods for resetting the auto-increment start value of various MySQL data table types MyISAM data table After a record with the maximum number is deleted, the number cannot be reused. You can use the "AUTO_INCREMENT = n" option to specify an auto-increment ini

Today learned a little keyword, inadvertently found himself has never been exposed to the autoOkay, I'm starting to crap again!Automatic storage duration. (deprecated)1) When declaring variables in block scope, in namespace scope, in init statements of for loops, etc, the type of the Vari Able may omitted and the keyword auto is used instead. Once the type of the initializer have been determined, the compiler determines the type that would replace the

In the RIPV2 version, for example, R1 now has a 10.1.1.2/24 route, if the RIPv2 version of the No auto-summary, then RIPv2 in the transmission of this route will be 10.1.1.0/24 out;If the auto-summary is not turned off, it will be routed in 10.0.0.0/8 form.To be direct, auto-summary means summarizing the main class boundaries, 10.0.0.0/8 or 172.16.0.0/16 or 192.1

The auto-increment auto_increment function in mysql is believed to have been used by every phper. This article will share with you the specific viewing and setting methods of the mysql Field Auto-increment function. The auto-increment auto_increment function in mysql is believed to have been used by every phper. This article will share with you the specific viewi

Tags: res name mon High performance art First color log mustSqlAUTO INCREMENT Field Auto-increment will generate a unique number when the new record is inserted into the table. AUTO INCREMENT FieldWe typically want to automatically create a value for the primary key field each time a new record is inserted. We can create a auto-increment field in t

Reset the initial value of AUTO_INCREMENT In the MySQL auto-incrementing ColumnNote that existing data will be deleted using any of the following methods.Method 1:Delete from tb1;Alter table tbl AUTO_INCREMENT = 100;(Benefit, you can set AUTO_INCREMENT to start with any value)Tip: if there are many columns and data, the speed will be very slow. For example, if there are more than 0.9 million rows, it will take more than 10 minutes.Method 2:Truncate tb

MYSQL obtains the auto-incrementing primary key. [four methods] bitsCN.com MYSQL obtains the auto-incrementing primary key. [four methods] After executing the insert operation on mysql in an 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 t

When migrating a database from MSSQL to MySQL, You need to insert 0 values in the auto-increment column of MySQL based on the requirements of business logic. In MSSQL, this is done as follows: When migrating a database from MSSQL to MySQL, You need to insert 0 values in the auto-increment column of MySQL based on the requirements of business logic. In MSSQL, this is done as follows: When migrating a da

__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 ($class _name) { echo$class _name, ' ; } New Demo ();The above code will be output at the end: __autload Class:demo.And after this error shows: Fatal error:class