mysql where length

You see this article from HTTP://WWW.CNBLOGS.COM/AYANMWReprinted from: http://blog.csdn.net/daydreamingboy/article/details/6310907Analyze the length of the MySQL data typeMySQL has several data types that can limit the "length" of a type, with char (

if the setting in an item is varchar (So, of course, the English isSo what about Chinese?Utf-8 in Chinese is 3 bytesSo, does this varchar (50) have only 16 characters to save? No, this is the case with MySQL, but not after 5.0.MySQL varchar (50)

If a varchar is set in an item (50) Well, that's 50 for English. So what about Chinese? Utf-8 Chinese occupies 3 bytes So, is this varchar (50) Only save 16 characters? MySQL varchar (50) in both Chinese and English, there are 50. MySQL5

MySQL study NOTE _ summary of MySQL character type VARCHAR length knowledge bitsCN.com MySQL study NOTE _ summary of MySQL character type VARCHAR length I. VARCHAR storage and row length restrictions 1. in VARCHAR (N), N refers to the length of

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

In the version above MySQL5.0, the length of the varchar data type is supported to 65535, which means that 65,532 bytes of data can be stored, and the start and end bits take up 3 bytes, that is, data stored in a fixed text or blob format in 4.1 or

One, MySQL installationInstall MySQL under CentOS Please open: http://www.centoscn.com/CentosServer/sql/2013/0817/1285.htmlIi. several important directories of MySQLMySQL installation is not as if SQL Server is installed by default in a directory,

MySQL study note _ Summary of MySQL character type VARCHAR length I. VARCHAR storage and row length restrictions1. in VARCHAR (N), N refers to the length of characters. The VARCHAR type supports a maximum of 65535 characters and 65535 bytes, but

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."

Generally, the entire string is used as the operation object, for example: search for a substring in a substring, obtain a substring, insert a substring at a certain position in the substring, and delete a substring. Generally, the entire string is