13.1 Numeric Data Types

13.1.1 Numeric Data Type Syntax

13.1.2 Integer Types (Exact Value) - INTEGER, INT, SMALLINT, TINYINT, MEDIUMINT, BIGINT

13.1.3 Fixed-Point Types (Exact Value) - DECIMAL, NUMERIC

13.1.4 Floating-Point Types (Approximate Value) - FLOAT, DOUBLE

13.1.5 Bit-Value Type - BIT

13.1.6 Numeric Type Attributes

13.1.7 Out-of-Range and Overflow Handling

MySQL supports all standard SQL numeric data types. These types include the exact numeric data types (INTEGER, SMALLINT, DECIMAL, and NUMERIC), as well as the approximate numeric data types (FLOAT, REAL, and DOUBLE PRECISION). The keyword INT is a synonym for INTEGER, and the keywords DEC and FIXED are synonyms for DECIMAL. MySQL treats DOUBLE as a synonym for DOUBLE PRECISION (a nonstandard extension). MySQL also treats REAL as a synonym for DOUBLE PRECISION (a nonstandard variation), unless the REAL_AS_FLOAT SQL mode is enabled.

The BIT data type stores bit values and is supported for MyISAM, MEMORY, InnoDB, and NDB tables.

For information about how MySQL handles assignment of out-of-range values to columns and overflow during expression evaluation, see Section 13.1.7, “Out-of-Range and Overflow Handling”.

For information about storage requirements of the numeric data types, see Section 13.7, “Data Type Storage Requirements”.

For descriptions of functions that operate on numeric values, see Section 14.6, “Numeric Functions and Operators”. The data type used for the result of a calculation on numeric operands depends on the types of the operands and the operations performed on them. For more information, see Section 14.6.1, “Arithmetic Operators”.