What data type is used for the amount field in mysql?

When storing amount information in MySQL, you can use the DECIMAL, NUMERIC, and MONEY data types. DECIMAL stores decimal numbers with a fixed number of decimal places, NUMERIC stores decimal numbers of arbitrary precision and scale, and MONEY is designed to store monetary values ​​and does not allow zeros after the decimal point. Choosing the appropriate data type depends on precision requirements, currency unit, and storage size. For most currency applications, the DECIMAL(10, 2) or MONEY data type is appropriate.

Amount field data type in MySQL

In the MySQL database, when storing amount information, you need to use the ability to represent Exact amount data type. Mainstream amount data types include:

• DECIMAL
• NUMERIC
• MONEY

DECIMAL

The DECIMAL data type stores decimal numbers with a fixed number of decimal places. It is defined by two parameters: precision (p) and scale (s). Precision is the total number of digits in a number, including those after the decimal point, while scale is the number of digits after the decimal point.

<code>DECIMAL(p, s)</code>

For example: DECIMAL(10, 2) represents a decimal number with a precision of 10 and 2 decimal places.

NUMERIC

NUMERIC is similar to DECIMAL, but it stores decimal numbers of arbitrary precision and scale. It is defined by a precision parameter that specifies the total number of digits in the number.

<code>NUMERIC(p)</code>

For example: NUMERIC(15) represents a decimal number with a precision of 15, where the position of the decimal point is determined by the application.

MONEY

The MONEY data type is specifically designed to store monetary values. It stores amounts with a fixed number of decimal places and does not allow zeros after the decimal point. Monetary values ​​are stored in cents or other monetary units, the smallest unit of measurement.

<code>MONEY</code>

For example: <code>MONEY</code> will store an amount value stored in cents.

Select the appropriate data type

Selecting the appropriate amount data type depends on the following factors:

• Accuracy requirements: The required level of accuracy for the amount.
• Currency unit: The smallest unit of measurement of currency.
• Storage size: Storage space requirements for data types.

Rule of thumb: For most currency applications, the DECIMAL(10, 2) or MONEY data type is appropriate.

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