• Specifying the CHARACTER SET binary attribute for a character string data type causes the column to be created as the corresponding【ˌkɔːrəˈspɑːndɪŋ相应的;相关的;符合的;】 binary string data type: CHAR becomes BINARY, VARCHAR becomes VARBINARY, and TEXT becomes BLOB....
还有拉丁文,日文,韩文,中文,都可以是组成字符串的元素。 字符串类型有哪些:char/varchar/ binary/varbinary/blob/text/enum/set/ The string data types are 11.3.2 The CHAR and VARCHAR Typesdev.mysql.com/doc/refman/8.0/en/char.html 官方文档贴在上面了。我也会写一些自己的理解。 对于字符串列(CHA...
The string data types areCHAR,VARCHAR,BINARY,VARBINARY,BLOB,TEXT,ENUM, andSET. In some cases, MySQL may change a string column to a type different from that given in aCREATE TABLEorALTER TABLEstatement. SeeSection 15.1.20.7, “Silent Column Specification Changes”. ...
11.3.1 String Data Type Syntax The string data types are CHAR, VARCHAR, BINARY, VARBINARY, BLOB, TEXT, ENUM, and SET. In some cases, MySQL may change a string column to a type different from that given in a CREATE TABLE or ALTER TABLE statement. See Section 13.1.18.6, “Silent ...
一、Data Types -数值类型 二、Date and Time Data Types -时间日期类型 三、String Data Types -字符类型 其他类型 记录 一、Data Types -数值类型 Integer Type(精确值) TINYINT SMALLINT MEDIUMINT INT BIGINT Fixed-Point Type(精确值) DECIMAL 和NUMERIC例:CREATE TABLE test1(num DECIMAL(5,2)); 范...
1.3、MySQL String数据类型 在MySQL中,字符串可以包含从纯文本到二进制数据(如图像或文件)的任何内容。通过使用LIKE运算符, 正则表达式和全文搜索,可以基于模式匹配来比较和搜索字符串 MySQL日期和时间数据类型 MySQL提供日期和时间类型以及日期和时间的组合。此外,MySQL支持 时间戳数据类型,用于跟踪表中一行的更改。如果...
数字类型/numeric types 日期和时间/date and time types 字符类型/string (character and byte) types 另外还包含两个没那么常用的大类: 特殊类型/spatial types JSON 继续之前,先来看一些单位上的约定和概念, M:根据具体不同的类型,其表示的意思不一样,见下方关于这个参数的讨论。 D 用于定点及浮点数,表示小...
In MySQL there are three main data types: string, numeric, and date and time. String Data Types Data typeDescription CHAR(size)A FIXED length string (can contain letters, numbers, and special characters). Thesizeparameter specifies the column length in characters - can be from 0 to 255. De...
ENUM: 枚举类型,用于存储单一值,可以选择一个预定义的集合。 SET: 集合类型,用于存储多个值,可以选择多个预定义的集合。 空间数据类型(Spatial Data Types) GEOMETRY, POINT, LINESTRING, POLYGON, MULTIPOINT, MULTILINESTRING, MULTIPOLYGON, GEOMETRYCOLLECTION: 用于存储空间数据(地理信息、几何图形等)。
MySQL has the following string data types: CHAR VARCHAR BINARY VARBINARY BLOB TEXT ENUM SET Char ACHARis a fixed length character data type. It is declared with a length,CHAR(x), where x can be between 0 to 255.CHARalways uses the same amount of storage space per entry. In case we sp...