This article delves into MySQL's numeric data types, including integers, fixed-point, floating-point, and bit types, emphasizing the importance of choosing the right type to avoid common pitfalls. Integer types, such as TINYINT and BIGINT, can be signed or unsigned. For precise values, DECIMAL is recommended, while floating-point types like FLOAT and DOUBLE are for approximate values, with attention to rounding issues. Additional insights on other numeric aliases like BOOL and SERIAL are also presented, offering developers practical guidance on effective data storage.
MySQL supports five exact integer types: TINYINT, SMALLINT, MEDIUMINT, INT, and BIGINT, which can be signed or unsigned, with the UNSIGNED option available for all types.
For exact numeric values like currency, DECIMAL(p,s) must be used, whereas FLOAT and DOUBLE are used for approximate values, with DOUBLE preferred for better precision.
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