MySQL

Mysqldump Backup Recovery and mysqldump Import and Export Statement details mysqldump backup: mysqldump-u username-p password-h host database a-w "SQL condition" -- lock-all-tables> path case: mysqldump-uroot-p1234-hlocalhost db1 a-w "id in (select

I. SQL Quick Start The following is an important quick reference for SQL. For SQL syntax and features added to standard SQL, please query the MySQL manual. 1. Create a table A table is one of the most basic elements of a database. Tables and tables

There are many application projects. At the beginning, MySQL Databases can basically meet various functional requirements. As the number of application users increases and the amount of data increases, MySQL gradually becomes overwhelmed: the

It is said that this is a master-optimized mysql for your reference. The number of connections: max_connections = 1500 can be changed based on the server performance. # Set-variable = connect_timeout = 5 # Set-variable = wait_timeout = 5 We

MySQL supports a large number of column types, which can be divided into three types: Number type, date and time type, and string (character) type. This section first provides an overview of available types, summarizes the storage requirements for

Abstract: This article describes how to create a user and how to assign permissions to the user. Although GRANT statements can assign permissions to users for ease of use, from the perspective of security, from the perspective of increasing

In this article, we will learn how to use a basic abstract class in PHP 5 to update data in two InnoDB tables using foreign key constraints. The following example shows how to use the foreign key constraint in the script language on the server. I.

This article mainly describes the actual operation steps for querying records of MySQL advanced query methods, as well as detailed descriptions of the Code to be used in the actual operation process, the following is a detailed description of the

MySQL command line is a must-have knowledge to learn MySQL databases. The following describes 10 useful MySQL command lines. I hope it will help you learn MySQL command lines. 1. display the data table structure: Mysql> DESCRIBE table name; (DESC

In the second version of High Performance Mysql, we can see the time-consuming comparison between SQL files and delimiter files during Backup and restoration.Method file size export time restore timeSQL dump 727 M 102 s 600 sDelimited dump 669 M 86

When installing wordpress on MacBookPro today, the installer always reports an error saying that it cannot connect to the database. The mysql client can be used normally and it can be determined that it is not a server problem. I wrote a php script

Here we will talk about how to maintain good performance when using hexadecimal big data, mainly about the MySQL database, which should also work for other databases. 1. Be careful about your character encoding Check the following SQL

After mysql was running for a while, there was a pile of mysql-bin.000 like *** In the mysql directory, which was arranged from the mysql-bin.000001 and took up a lot of hard disk space, up to dozens of GB. what should we do for these files with

Table A records the following:AID aNum1 a200501112 a200501123 a200501134 a200501145 a20050115Table B records the following:BID bName1 20060324012 20060324023 20060324034 20060324048 2006032408 The experiment is as follows:1. left joinThe SQL

I checked some differences between clob and blob. I remember that clob is suitable for storing large text files, while blob is suitable for storing Image Binary files, it is understood as character and binary. However, after a hands-on experiment

PS: This configuration file is designed for Dell R710, dual Xeon E5620, and 16 GB memory hardware. CentOS 5.6 64-bit system, MySQL 5.5.x stable version. Applicable to websites with daily IP addresses of 50-100 w and PV of-w, mainly using the InnoDB

Mysql> select now (); select now ()-10;+ --------------------- +| Now () |+ --------------------- +| 21:07:20 |+ --------------------- +1 row in set (0.00 sec) + ----------------------- +| Now ()-10 |+ ----------------------- +| 1, 20090925210710.00

GRANT ALL PRIVILEGES1. Change the table method. It may be that your account is not allowed to log on remotely, but only on localhost. At this time, you only need to log in to mysql on the computer of localhost, and change the "host" entry in the

Problem:Development Environment: delphi7se + mysql 5.0.67 + dbexpress 2.0 + mysql50openDevelopment Control: tsimpledataset + datasoure + dbgrid/dbeditPermission: mysql has granted the select/update permission to the user.If the data is modified,

Installing MySQL sudo apt-get install mysql-server should be simple, and I don't think there is much problem with installation, so I will not talk about it much. Let's talk about the configuration below. Configure MySQL. Note that in Ubuntu, MySQL