What data type is decimal in mysql?

DECIMAL is a high-precision data type used to store fixed-point decimals in MySQL. Its features include: precision (specified by (M, D)), range, no loss of precision, and storage space. It is often used in scenarios that require high-precision currency calculations, such as banking systems, accounting software, and e-commerce platforms.

What is the DECIMAL data type in MySQL?

DECIMAL is a data type in MySQL used to store fixed-point decimals. It is more precise than the FLOAT or DOUBLE data types because it uses a fixed number of decimal places.

Characteristics of DECIMAL:

• Precision: DECIMAL The precision of the number of decimal places is fixed and determined by the data definition The (M, D) parameters are specified, where:

  • M: The number of digits to the left of the decimal point (integer part)
  • D: The number of digits to the right of the decimal point (fractional part)
• Range: DECIMAL allows a wide range of stored values, from -10^38-1 to 10^38-1.
• Loss of precision: Unlike FLOAT and DOUBLE, DECIMAL does not lose precision when performing arithmetic operations.
• Storage space: DECIMAL occupies the same storage space as FLOAT, but requires less space than DOUBLE.

Uses of DECIMAL:

The DECIMAL data type is often used in scenarios that require high-precision currency calculations, such as:

• Banks System
• Accounting software
• E-commerce platform

Example:

The following statement creates an account named "amount " DECIMAL column, precision is (10, 2):

<code class="sql">CREATE TABLE transactions (
  amount DECIMAL(10, 2) NOT NULL
);</code>

This column can store values ​​with a maximum precision of two decimal places and an integer part of up to 10 digits.

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