Data Types in MySQL MySQL stores information in different formats. It allows different types of data to be used in different ways. The main types of data arecharacter, numerical, and date and time. When you create a database, you tell MySQL what kind of data to expect in a particular co...
MySQL 支持所有标准 SQL 数值数据类型。 这些类型包括严格数值数据类型(INTEGER、SMALLINT、DECIMAL 和 NUMERIC),以及近似数值数据类型(FLOAT、REAL 和 DOUBLE PRECISION)。 关键字INT是INTEGER的同义词,关键字DEC是DECIMAL的同义词。 BIT数据类型保存位字段值,并且支持 ...
MySQL offers many datatypes apart from numeric and string types to store the values in the columns. These data types may be used to specify the behavior of the columns and kind of values so one can be allowed to shop in it. Data types in MySQL are associated with more than one ...
In some cases, MySQL may change a string column to a type different from that given in a CREATE TABLE or ALTER TABLE statement. For definitions of character string columns (CHAR, VARCHAR, and the TEXT types), MySQL interprets【ɪnˈtɜːrprəts诠释;说明;把…理解为;领会;口译;】 ...
MySQL DataType--定点数(Fixed-Point Types)学习 DECIMAL和NUMERIC MySQL支持两种定点数类型:DECIMAL和NUMERIC,而NUMERIC实现为DECIMAL,因此MySQL中DECIMAL和NUMERIC等价相同。 如使用下面建表语句: CREATETABLEtb003( idINTPRIMARYKEY, c1DECIMAL(20,5), c2 NUMERIC(18,5)...
MySQL Data Types (Version 8.0) 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...
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...
13.9 Using Data Types from Other Database EnginesMySQL supports SQL data types in several categories: numeric types, date and time types, string (character and byte) types, spatial types, and the JSON data type. This chapter provides an overview and more detailed description of the properties ...
Table 1: Signed integer types The integer types differ in their storage. We can choose values that fit our requirements. mysql> CREATE TABLE Ages(Id SMALLINT, Age TINYINT) ENGINE=Memory; We have created a temporaryAgestable. This will be only a temporary testing table, so there will be ...
11.1.4 Floating-Point Types (Approximate Value) - FLOAT, DOUBLE 11.1.5 Bit-Value Type - BIT 11.1.6 Numeric Type Attributes 11.1.7 Out-of-Range and Overflow Handling MySQL supports all standard SQL numeric data types. These types include the exact numeric data types (INTEGER,SMALLINT,DECIMAL...