What are the basic data types of mysql?

Mysql basic data types include integer types, floating point types, string types, date and time types, Boolean types, etc. Detailed introduction: 1. Integer type, which provides a variety of integer types, occupying 1, 2, 3, 4 and 8 bytes respectively, and can store integer values ​​in different ranges; 2. Floating point type, supports two floating point types. FLOAT and DOUBLE are used to store single-precision and double-precision floating-point numbers respectively; 3. String type provides a variety of string types, which can store strings of different lengths and binary data, etc.

# Operating system for this tutorial: Windows 10 system, Dell G3 computer.

MySQL is a popular relational database management system that supports multiple data types. Basic data types include integers, floating point numbers, strings, dates and times, Boolean values, etc. The basic data types of MySQL will be introduced in detail below.

Integer types

MySQL provides a variety of integer types, including TINYINT, SMALLINT, MEDIUMINT, INT and BIGINT. They occupy 1, 2, 3, 4 and 8 bytes respectively and can store different ranges of integer values. For example, TINYINT can store integers in the range -128 to 127, while BIGINT can store integers in the range -9223372036854775808 to 9223372036854775807.

Floating point type

MySQL supports two floating point types: FLOAT and DOUBLE. They are used to store single-precision and double-precision floating point numbers respectively. FLOAT occupies 4 bytes and can store floating point numbers with approximately 7 digits of precision, while DOUBLE occupies 8 bytes and can store floating point numbers with approximately 15 digits of precision.

String type

MySQL provides a variety of string types, including CHAR, VARCHAR, BINARY, VARBINARY, TEXT and BLOB. Among them, CHAR and VARCHAR are used to store fixed-length and variable-length strings, BINARY and VARBINARY are used to store fixed-length and variable-length binary data, and TEXT and BLOB are used to store large text and binary data. These string types can store string and binary data of varying lengths.

Date and time types

MySQL supports multiple date and time types, including DATE, TIME, DATETIME, and TIMESTAMP. These types are used to store date and time information and can represent date and time values ​​of varying precision. For example, DATE is used to store date values, TIME is used to store time values, DATETIME is used to store date and time values, and TIMESTAMP is used to store timestamp values.

Boolean type

In MySQL, the Boolean type is represented by TINYINT(1), which can store Boolean values ​​true and false. TINYINT(1) is actually an integer type, but can be used to represent Boolean values, where 1 represents true and 0 represents false.

In addition to the above basic data types, MySQL also supports other data types, such as enumeration types, collection types, geometry types, etc. Enumeration types are used to store enumeration values, collection types are used to store collections of multiple enumeration values, and geometry types are used to store geometric data. These data types can meet different data storage needs.

In short, MySQL’s basic data types include integer types, floating point types, string types, date and time types, Boolean types, etc. These data types can meet various data storage and processing needs and are an important part of the MySQL database.

The above is the detailed content of What are the basic data types of mysql?. For more information, please follow other related articles on the PHP Chinese website!