mysql char

Charvarcharvarchar2 differences: 1. the length of CHAR is fixed, while the length of VARCHAR2 can be changed. For example, the storage string "abc", for CHAR (20 ), it indicates that the characters you store will occupy 20 bytes (including 17 null

MySQL Char,varchar,text,blob is a few links but there are a lot of different types of fields, which is the basis of MySQL, but the foundation did not learn, bad to fill.Let's summarize briefly:Char: fixed length , maximum 255 charactersVARCHAR:

Original URL: The difference between char and varchar in http://www.jb51.net/article/23575.htmmysql font: [Increase decrease] type: reprinted in MySQL tutorial the difference between char and varchar,  are used to store strings, except that they are

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 -

The maximum length of the MySQL database varchar type in versions earlier than 5.0.3 is 255, and its data range can be 0 ~ 255 The maximum length of the MySQL database varchar type in versions earlier than 5.0.3 is 255, and its data range can be 0 ~

Char varchar varchar2 the difference http://blog.csdn.net/honglei_zh/article/details/7172538Difference:1. The length of the char is fixed, and the length of the VARCHAR2 is changeable, for example, storing the string "abc", for Char (20), which

I. Evolution: The varchar type of MySQL database has a maximum length limit of 255 in the version below 5.0.3, and its data range can be 0~255. In the MySQL5.0.3 and above versions, the length of the varchar data type is supported to 65535, which

The difference between char and varchar char (13) length fixed, such as ' www.jb51.net ' storage requires space 12 characters varchar (13) variable length as ' www.jb51.net ' requires storage space of 13 characters, From the above you can see

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

the difference between a MySQL char and a varcharChar is a fixed-length type, and varchar is a variable-length type that differs from:1. Char (m) Type of data column, each value occupies M bytes, if a length of less than M,mysql will be on its right