introduction to mysql

A Brief Introduction to MySQL's B-tree index and INDEX OPTIMIZATION, and a brief introduction to mysql MySQL MyISAM and InnoDB engines use B + tree indexes by default ("BTREE" is displayed during queries). This article discusses two issues: Why

Introduction to mysql database memory Engine? Application Scenario: the database needs to be queried dynamically at a high speed, which is more dynamic than memcached .? How to view the engine of your current database. Mysqlshowengines; the result

mysql|odbc| Data | Database sender: Engineer (Jean ~ still have to go, sigh ...), letter area: Linux Title: Introduction to MySQL Database and its ODBC interface (1) (reprint) Letter station: BBS Water Wood Tsinghua Station (Mon Aug 9 18:03:16 1999)

Chapter II Introduction to MySQL data types· first section: integer type, floating-point type, and fixed-point number typeIntegral type:· TinyInt (1 bytes)· SmallInt (2 bytes)· mediumint (3 bytes)· Int and Integer (4 bytes ) · BigInt (8

Introduction to MySQL global shared memory Preface The global shared memory is mainly used by MySQL Instance (mysqld process) and the underlying storage engine to store various global operations and shared temporary information, such as the Query

A Brief Introduction to the transaction mechanism in MySQL and a brief introduction to mysql transactions Start with a question Recently, the Bank has suffered a lot of troubles. Many depositors put their money in the bank, but the bank still does

Introduction to MySQL database environment (1) [group chart] TIP: before using MySQL, you need to create a database environment to create a data table. First, you need to install the database environment, that is, MySQL. 1. download MySQL official

A brief introduction to mysql database formatting: bitsCN. comDATE_FORMA T (date, format) format the date or date and time value date based on the format string, and return the result string. You can use DATE_FORMAT () to format the DATE or DATETIME

A Brief Introduction to MySQL replace, mysqlreplace Today, when I upgraded discuz, I encountered a primary key repeat, which caused the data insertion to fail. Then I searched for the problem. The method described here was to replace into and then

Introduction to MySQL triggers This article mainly introduces MySQL triggers, including using triggers to add, update, and delete users. For more information, see In many cases, it is better to understand the benefits. The solution should be

MySQL is a simple and easy-to-use basic operation guide. (1) Introduction to mysql basic operations System: Ubuntu 14.04 LTS Installation: Apt-get install mysql // install the database apt-get install mysql-workbench // install the graphical

Introduction to MySQL Binlog Basic definition of binlog: Binary logs are also binary logs that record SQL statements that have occurred or potentially changed data and are saved in the disk in binary format; Role: MySQL is similar to Oracle archive

mysql|odbc| Data | Database sender: Engineer (Jean ~ still have to go, sigh ...), letter area: Linux Title: Introduction to MySQL Database and its ODBC interface (4) (reprint) Letter station: BBS Water Wood Tsinghua Station (Mon Aug 9 18:03:41 1999)

MySQL is a relational database (relational databases Management System), this so-called "relational" can be understood as the concept of "table", a relational database consists of one or more tables, a table: header (header): The name of

The source of this article: http://www.cnblogs.com/wy123/p/6979499.htmlThe show Profile command is used to track resource consumption information for executed SQL statements, which can help you see how SQL statements are executed and can be used as

Explain shows how MySQL uses indexes to process SELECT statements and join tables. Can help select better indexes and write more optimized query statements.Parse an SQL statement first to see what

Learn MySQL for some time, in MySQL configuration optimization to do a summary, MySQL optimization to take into account the manifold, multi-factor. is closely related to the server's hardware and the currently running environment. Here's a look at

In-depth introduction to MySQL two-way replication technology to set up MySQL data synchronization (one-way and two-way) due to the company's business needs, data synchronization between China Netcom and China Telecom is required, and a MySQL

Introduction to mysql high availability solution MHA is a MySQL failover solution written by MySQL daiu in Japan using Perl to ensure high availability of the database system. failover and MHA deployment can be completed within 10-30 seconds of

A Brief Introduction to MySQL multi-source replication and mysql Replication Recently, ORACLE released several new features in the latest version of Mysql5.7.2. Most of the improvements are in terms of database performance and replication-related