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 MyISAM、MEMORY、InnoDB 和 BDB表。 作为...
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) )ENGINE=INNODBDEFAULTCHARSET=utf8; 表创建...
MySQL interprets【ɪnˈtɜːrprəts诠释;说明;把…理解为;领会;口译;】 length specifications in character units. For definitions of binary string columns (BINARY, VARBINARY, and the BLOB types), MySQL interprets length specifications in byte units. ...
5.8.2.3.1 User Data Types5.8.2.3.2 Data Type ResolutionIn general, the data type of an argument is resolved using the following criteria, in order of priority: The expected data type for the target parameter. The data type of the value based on the JSON specification. User specified da...
MySQL 8.0 does not support year in two-digit format. MS SQL Server Data Types String Data Types Data typeDescriptionMax char lengthStorage char(n)Fixed-length non-Unicode character data (n must be between 1 and 8000)8,000n bytes (uses one byte for each character) ...
DATETIME, DATE, and TIMESTAMP Types Time Type MySQL fetches and displays TIME values in 'HH:MM:SS' format or 'HHH:MM:SS' format The range of. TIME values from '-838:59:59' to '838:59:59'. The hours part may be rather large because not only the TIME type can be used to repres...
MySQL supports these groups of data types: Numeric Date & time String JSON Choosing the right data types for columns is a part of the initial design of the database. Data types ensure the correctness of the data provided. They ensure that the data is used in a meaningful way. This is ...
If you create a table with types used by other vendors and then issue a DESCRIBE tbl_name statement, MySQL reports the table structure using the equivalent MySQL types. For example: mysql> CREATE TABLE t (a BOOL, b FLOAT8, c LONG VARCHAR, d NUMERIC); Query OK, 0 rows affected (...
读MySQL5.7文档11.2 Date and Time Data Types MySQL的时间类型分为DATE, DATETIME, TIMESTAMP, TIME, YEAR五个类型。接下来为大家一一介绍下。 DATE类型 存储YYYY-MM-DD类型的时间,取值范围是'1000-01-01' to '9999-12-31'。 DATETIME和TIMESTAMP类型 ...
Table 16-1lists the data types and categorizes them as numeric, string, date, or complex. You can find the full description of each data type later in this chapter. Table 16-1. MySQL data types Data type Classification BIGINT Numeric ...