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: Working with date time arithmetic #Part 2.3.1 MySQL FLOAT vs DEC: working with fraction and decimal [DEC] So far we have covered many of of useful datatypes of MySQL. Some of them are integers, text, varchar and most importantly, date and time and date-time manipulation. Now, le...
Note:Data types might have different names in different database. And even if the name is the same, the size and other details may be different!Always check the documentation! MySQL Data Types (Version 8.0) In MySQL there are three main data types: string, numeric, and date and time. ...
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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 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 this part of the MySQL tutorial, we cover MySQL data types. A data type is a set of representable values. Each value belongs to one data type. Items that can be referenced by a name, such as SQL parameters, columns, fields, attributes, and variables, also have declared types. ...
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 Date and Time Types The date and time types represent DATE, TIME, DATETIME, TIMESTAMP, and YEAR. Each type has a range of valid values, as well as a “zero” value. DATETIME, DATE, and TIMESTAMP Types Time Type MySQL fetches and displays TIME values in 'HH:MM:SS' format or ...
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 column by using the My...