Data Types for MariaDB Enterprise Server 10.5

This page is part of MariaDB's MariaDB Documentation.

The parent of this page is: Reference for MariaDB Enterprise Server 10.5

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Overview

Overview

Each column in a table has a specified data type that defines what kind of data can be stored in the column.

Data Type	Class	Description
TINYINT	Integer	Integer from -128 to 127 when signed, or from 0 to 255 when unsigned
SMALLINT	Integer	Integer from -32768 to 32767 when signed, or from 0 to 65535 when unsigned
MEDIUMINT	Integer	Integer from -8388608 to 8388607 when signed, or from 0 to 16777215 when unsigned
INT	Integer	Integer from -2147483648 to 2147483647 when signed, or from 0 to 4294967295 when unsigned
BIGINT	Integer	Integer from -9223372036854775808 to 9223372036854775807 when signed, or from 0 to 18446744073709551615 when unsigned
DECIMAL	Fixed Num	Fixed-point number
FLOAT	Float	Single-precision floating-point number
DOUBLE	Float	Double-precision floating-point number
CHAR	String	Fixed-length string with limit up to 255 bytes
NATIONAL CHAR	String	Fixed-length string of specific character set with limit up to 255 bytes
VARCHAR	String	Variable-length string with limit up to 65,535 bytes
NATIONAL VARCHAR	String	Variable-length string of specific character set with limit up to 65,535 bytes
TINYTEXT	String	String for variable-length text data up to 255 bytes
TEXT	String	String for variable-length text data up to 65,535 bytes
MEDIUMTEXT	String	String for variable-length text data up to 16,777,215 bytes
LONGTEXT	String	String for variable-length text data up to 4,294,967,295 bytes
JSON	String	A synonym of LONGTEXT with a default `json_valid()` CHECK (check added in MariaDB Community Server 10.4.3)
TINYBLOB	String	String for variable-length binary data up to 255 bytes
BLOB	String	String for variable-length binary data up to 65,535 bytes
MEDIUMBLOB	String	String for variable-length binary data up to 16,777,215 bytes
LONGBLOB	String	String for variable-length binary data up to 4,294,967,295 bytes
BINARY	String	Fixed-length string for binary data with limit up to 255 bytes
VARBINARY	String	Variable-length string for binary data with limit up to 65,535 bytes
BIT	Bit	Bit data
SET	Set	One or more comma-separated values from a set of up to 64 pre-selected options
ENUM	Set	A single value from up to 65,535 pre-selected options
TIME	Time	Hours, minutes, seconds
YEAR	Date	Two-digit or four-digit year
DATE	Date	Year, month, day
TIMESTAMP	Date/Time	Year, month, day, hours, minutes, seconds with dates from 1970 to 2038
DATETIME	Date/Time	Year, month, day, hours, minutes, seconds with dates from 1000 to 9999
POINT	Geometry	WKB Point coordinate data
LINESTRING	Geometry	WKB LineString from WKB Point coordinate data
MULTIPOINT	Geometry	WKB MultiPoint from WKB Point coordinate data
MULTILINESTRING	Geometry	WKB MultiLineString from WKB LineString data
MULTIPOLYGON	Geometry	WKB MultiPolygon from WKB Polygon data
POLYGON	Geometry	WKB Polygon from WKB LineString data
GEOMETRYCOLLECTION	Geometry	WKB Geometry Collection
GEOMETRY	Geometry	Accepts collection data; and point, line, polygon single or multi
SERIAL	Alias	This is an alias for `BIGINT UNSIGNED NOT NULL AUTO_INCREMENT UNIQUE`
INET6	Binary	Stores an INET6 or mapped INET4 network address as a BINARY(16) internally while translating it into a CHAR(39) to the user
ROW	SQL/PSM	This declaration is only available inside a stored procedure
ROW TYPE OF	SQL/PSM	This is special declaration only available inside a stored procedure
TYPE OF	SQL/PSM	This is special declaration only available inside a stored procedure
SQL_TSI_YEAR	Date	See YEAR
DEC	Fixed Num	See DECIMAL
FIXED	Fixed Num	See DECIMAL
NUMERIC	Fixed Num	See DECIMAL
FLOAT4	Float	See FLOAT
FLOAT8	Float	See DOUBLE
DOUBLE PRECISION	Float	See DOUBLE
REAL	Float	See DOUBLE
BOOL	Integer	See TINYINT
BOOLEAN	Integer	See TINYINT
INT1	Integer	See TINYINT
INT2	Integer	See SMALLINT
INT3	Integer	See MEDIUMINT
MIDDLEINT	Integer	See MEDIUMINT
INT4	Integer	See INT
INTEGER	Integer	See INT
INT8	Integer	See BIGINT
NUMBER	SQL/PL	See DECIMAL
DATE (with time portion)	SQL/PL	See DATETIME
RAW	SQL/PL	See VARBINARY
VARCHAR2	SQL/PL	See VARCHAR
CLOB	SQL/PL	See LONGTEXT
CHAR BYTE	String	See BINARY
NATIONAL CHARACTER	String	See NATIONAL CHAR
NCHAR	String	See NATIONAL CHAR
CHAR VARYING	String	See VARCHAR
CHARACTER	String	See CHAR
CHARACTER VARYING	String	See VARCHAR
NATIONAL CHAR VARYING	String	See NATIONAL VARCHAR
NATIONAL CHARACTER VARYING	String	See NATIONAL VARCHAR
NATIONAL VARCHARACTER	String	See NATIONAL VARCHAR
NCHAR VARCHAR	String	See NATIONAL VARCHAR
NCHAR VARCHARACTER	String	See NATIONAL VARCHAR
NCHAR VARYING	String	See NATIONAL VARCHAR
NVARCHAR	String	See NATIONAL VARCHAR
VARCHARACTER	String	See VARCHAR
LONG	String	See MEDIUMTEXT
LONG CHAR VARYING	String	See MEDIUMTEXT
LONG CHARACTER VARYING	String	See MEDIUMTEXT
LONG VARBINARY	String	See MEDIUMBLOB
LONG VARCHAR	String	See MEDIUMTEXT
LONG VARCHARACTER	String	See MEDIUMTEXT