MySQL

First, download the installation files Find zip file at MySQL official website Second, extract files, select location It's best to put it on a certain disk in the MySQL folder, which is easier to find, where we extract the files to the D-Disk

Some character set and collation system variables are related to client and server interactions. Some of the things that have been mentioned in the previous chapters are: • Server character sets and proofing rules can be used as values for

Core tip: MySQL provides database replication functionality after version 3.23.15. The function of two database synchronization, master-slave mode and mutual backup mode can be realized by using this feature. The settings for database

By default, MySQL supports three engines: ISAM, MyISAM, and heap. The other two types are InnoDB and Berkley (BDB). ISAM ISAM is a well-defined and time-tested method of data table management, designed to take into account that the number of times

Recently, you need to export the database under Mysql5.0 and then import it into the MySQL 3.23 database. I use the following methods: $ mysqldump-u root--skip-comments--compatible=mysql323--databases db1 DB2 db3 > Mydump.sql Import on another

Batch processing is a way to run a MySQL program that is not interactive, and you will still use these commands, just as you would for the commands you use in MySQL. In order to implement batch processing, you redirect a file to a MySQL program,

Even if the MyISAM table format is very reliable (all the changes that the SQL statement makes to the table are written before the statement returns), you can still get the corrupted table if any of the following events occur: · The mysqld process

This article mainly describes the way in which MySQL responds to a disk full error (such as "No remaining space on the device"), and how to respond to a quota error (such as write failure or "Reach User screen limit"). The content described in this

The static format is the default storage format for MyISAM tables. Use this format when the table does not contain variable length columns (VARCHAR, blobs, or text). Each row is stored with a fixed byte number. Of the three storage formats for

I use binary for installation, filename mysql-standard-5.0.18-linux-i686-glibc23.tar.gz [1] Extract the above file to a certain place, and MySQL so directory name to MySQL, the result should be as/home/jiang/mysql [2] According to the MySQL

Some MySQL publications have made changes to the structure of the system tables in the MySQL database, adding new permissions or attributes. When you update to the new version of MySQL, you should also update the system tables to ensure that their

There are several ways in which a table full error occurs: • You are using a MySQL server below version 3.23, and the "in-memory" temporary table exceeds the tmp_table_size byte. To avoid this problem, use the "-O tmp_table_size=val" option to

Note that the following sections are mainly related to double and float columns because of the inaccurate nature of floating-point numbers. MySQL performs a decimal operation using the precision of a 64-bit decimal value, which should solve most of

Hardware: Intel (R) Xeon (r) CPU 5130 @ 2.00GHz * 2, 4G RAM, 564G SAS Software: Red Hat Enterprise Linux as Release 4 (Nahant Update 4) 2.6.9 42.ELSMP (32-bit), MySQL 5.0.27-standard-log Total records: 1016126, average size of 46822 per line 1.

This article gives you a brief introduction to MySQL's ysql left join, right and inner joins, as well as a simple example of the specific operations. Take MySQL for example. Create two data tables in the MySQL database and insert some data

InnoDB is the most widely used transaction storage engine in MySQL, and many parts of the design and Oracle are common. For Oracle DBAs, learning can be more of an analogy to some of Oracle's features, and of course, to understand the difference.

MySQL defaults to the data file storage directory for/var/lib/mysql. If you want to move the MySQL directory to/home/data, you need to do the following steps: 1, the home directory to establish the data directory Cd/home mkdir data 2, the MySQL

Phpmybackuppro is a professional MySQL backup tool. You can back up multiple servers, multiple databases, you can back up data to FTP or email, you can automatically back up, you can set up scheduled tasks, you can restore the database, execute SQL

Question: Table T has a field called C, now want to C inside the 10th and 11th column position to swap, how ah? Answer: Use the following method, but this example only have the function of ASCII characters, Chinese or other to find a way.

The compressed storage format is a read-only format created by the Myisampack tool. All MySQL distributions include myisampack by default. Compressed tables can be decompressed using MYISAMCHK. A compressed table has the following characteristics: