mysql function example

1. Full backup and incremental backup 1.1 full-scale backupFull-volume data is all the data in the database, and a full backup is the backup of all the data in the database.Back Up all libraries:mysqldump -uroot -p123456 -S /data/3306/mysql.sock -F -

MySQL database functions are frequently used in actual operations. Therefore, it is best to have a certain understanding of MySQL database functions. I found this article very well on a website, I have made a special offer for you to share with you

String function string comparison function if the result length is greater than the maximum value of the max_allowed_packet system variable, the return value of the string value function is NULL. See section 7.5.2 "Adjust server Parameters ". String

For operations on string positions, the first position is marked as 1. ASCII (str) Returns the ASCII code value of the leftmost character of the string str. If Str is an empty string, returns 0. If STR is NULL, returns NULL. Mysql> Select ASCII (' 2

1. download MySql 1. download MySql Open http://www.mysql.com/downloads/mysql/#downloads download in browser My downloaded version is Red Hat 5 version of http://www.mysql.com/downloads/mirror.php? Id = 407552 Upload the file to the server, or

String functionsstring comparison functionsIf the length of the result is greater than the maximum value of the Max_allowed_packet system variable, the return value of the string value function is null. See section 7.5.2, "Tuning server parameters."

-- Add users and groups [root @ zlmlocal] groupadd [root @ zlmlocal] useradd-gmysql-ssbinnologin-doptmsyqlmysql -- create a directory [root @ zlmlocal] mkdirdatamysqlmysql_3306 {data, l -- Add users and groups[Root @ zlm local] # groupadd [Root @

MySQL obtains the current date and time stamp function bitsCN.com MySQL returns the current date, time, and timestamp. 1.1 obtain the current date + time (date + time) function: now () Mysql> select now (); + ------- + | Now () | + ------- + | 22:2

MySQL Common date addition and subtraction function and example tutorialMySQL Date TypeMySQL Date Type: Date format, occupied storage space, date range comparison.Date type storage space Date format date range------------  ---------   ---------------

MySQL常用指令，java，php程序员，数据库工程师必备。程序员小冰常用资料整理MySQL common commands (for reference)The most common display commands are:1. Display the list of databases.show databases;2. Display the data table in the library:Use MySQL;Show tables;3, display the