MySQL

Transferred from: http://www.jb51.net/article/30128.htma preparation1 downloads for Apache Http://httpd.apache.org/download.cgi#apache24 httpd-2.2.22-win32-x86-openssl-0.9.8t.msiOpenSSL with OpenSSL module, using OpenSSL to configure SSL secure

Operators and functions in MySQL:1, character function;2, numeric operators and functions;3, comparison operators and functions;4, date time function;5, information function;6, aggregation function;7, encryption functions, etc.; 6-1. Character

First, mathematical functionsMathematical functions are mainly used for processing numbers, including integers, floating-point numbers, and so on.ABS (x)Returns the absolute value of XSELECT ABS (-1)--return 1Ceil (x), CEILING (x)Returns the

The book for the Php+mysql development of the CD-ROM attached to the source code, a comparison of the basis, there is a point I very much appreciate is that the beginning of the book is very low, the entry to see this is very good, and the system is

1. Download the installation package from the official website:Mysql-5.7.12-win32.zip2. Unzip to C drive (any drive letter is OK)C:\mysql-5.7.12-win323. Modify the configuration file: C:\mysql-5.7.12-win32\my-default.ini# for advice The change

The self-increment field must be set to primary key.To specify starting from 1000, for example.1 Set the table when you create it:CREATE TABLE ' Test ' ( ' ID ' int (one) ' is not null auto_increment, ' NAME ' varchar (2) is not

为已经添加好的数据表添加外键:语法:alter table 表名 add constraint FK_ID foreign key(你的外键字段名) REFERENCES 外表表名(对应的表的主键字段名);例: alter table tb_active add constraint FK_ID foreign key(user_id) REFERENCES tb_user(id)//FK_ID是外键的名称/*CREATE TABLE `tb_active` ( `id` int(11)

Zabbix MPM monitoring MySQL is a pretty good monitoring module, but recently the official website has not called MPM, but called fpmmm, for the reasons:Fpmmm is the successor of MPM. MPM is renamed to Fpmmm because of the naming conflict with the

"Reprint link" MySQL-5.6.24 free installation version of the configuration method, the need for friends can refer to the next.1. Download MySQL Community Server 5.6.242. Unzip the MySQL archive packageUnzip the downloaded MySQL package into a custom

Modify the MySQL time zone, involving parameter time_zone First you need to check the current time zone of MySQL with the Time_zone parameter ? 1 2 3 4 5 6 7 8 9 [html] mysql> show variables like‘%time_zone%‘;     +------------------+--------+  |

MySQL Learning note-Trigger programA trigger is a named database object related to a table that fires when a specific event occurs on the table.CREATE Trigger SyntaxCREATE Trigger Syntax:CREATE TRIGGER trigger_name trigger_time trigger_event ON

-- ------------------------------ Table structure for `TabName`-- ----------------------------DROPTABLEIF EXISTS `TabName`;CREATETABLE`TabName` (  `Id` int(11) NOTNULL AUTO_INCREMENT,  `Name` varchar(20) DEFAULTNULL,  `Date`

Since MSYQL does not have an Oracle sequence method, when using the MySQL self-increment ID field, you want to get the ID value of this insert for immediate use, in the MyBatis configuration as follows:INSERT into question (Name,majorid) VALUES

JDBC (Java Data Base Connectivity,java database connection) is a Java API for executing SQL statements that provides unified access to a variety of relational databases, consisting of a set of classes and interfaces written in the Java language.

Peng Peng in the classroom: Statistics specify the time period of the database table operation times. the debut, need the Great God to help optimize. # # # # #注::: The path in the following script may require you to modify it yourself650)

Mysql performance optimization 3 (Table sharding, Incremental backup, and restoration), mysql Performance OptimizationHorizontal table Division If a table contains too many records, for example, tens of millions of records and needs to be searched

How to select the installation path when installing the installation package of MySQL 5.5/5.6/5.7 or later, mysql5.6 Installation environment requirements: Mysql 5.7 has been installed yesterday and a problem has been found. mysql 2003 does not

Mysql logon ERROR message: ERROR 1045 (28000) solution, 104528000 This article analyzes the solution to the mysql logon ERROR: ERROR 1045 (28000. We will share this with you for your reference. The details are as follows: I. Problems: The root user

Installation and configuration of MySQL 5.6 in Windows (big image version), mysql5.6 I. Preparations before installation 1. Download the installation package from the official MySQL website www.mysql.com. 1-1: Figure 1-1 The downloaded

MySQL database-error 1166 Incorrect column name, 1166 incorrect MySQL database-error 1166 Incorrect column name field name is displayed. This field contains spaces. You only need to use alert or phpmyadmin to modify the field. The following error