下表显示了 MySQL 中支持的所有二进制大对象数据类型: 空间数据类型 它是一种特殊的数据类型,用于保存各种几何和地理值。它对应于 OpenGIS 类。下表显示了 MySQL 中支持的所有空间类型: JSON 数据类型 MySQL 从 v5.7.8 版本开始提供对原生 JSON 数据类型的支持。...
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...
The numeric category is further subdivided into more specific groups. The table below shows different numeric data types, their signed and unsigned ranges, and a short description. Note:TheFLOAT(p)syntax is also valid, wherepspecifies the precision. Different values ofpresult in different behavior...
For more information about fragment log files, see the description for NoOfFragmentLogFiles. InitialNoOfOpenFiles Version (or later) NDB 8.4.0 Type or units files Default 27 Range 20 - 4294967039 (0xFFFFFEFF) Restart Type Node Restart: Requires a rolling restart of the cluster. (NDB 8.4...
The following is a table of integer types in MySQL:TINYINT,MEDIUMINTandBIGINTare MySQL extensions to the SQL standard. Table 1: Signed integer types The integer types differ in their storage. We can choose values that fit our requirements. ...
2.4 Date and Time Type Storage Requirements For TIME, DATETIME, and TIMESTAMP columns, the storage required for tables created before MySQL 5.6.4 differs from tables created from 5.6.4 on. This is due to a change in 5.6.4 that permits these types to have a fractional part, which requires...
Data type mapping occurs at table creation time, after which the original type specifications are discarded. If you create a table with types used by other vendors and then issue aDESCRIBEtbl_namestatement, MySQL reports the table structure using the equivalent MySQL types. For example: ...
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 ...
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;】...
Data Types in MySQL MySQLis very rich when it comes to data types. There are a wide variety of options available to efficiently store and retrieve data. The following data types are most commonly available. INT– For storing integer values. ...