How is the DECIMAL data type used in MySQL?

DECIMAL is a data type used for storing precise numerical values with a fixed level of accuracy and decimal places.

The usage of DECIMAL is as follows:

1. Definition of the DECIMAL data type: DECIMAL(p, s), where p represents the total number of digits (including both integer and decimal places), and s represents the number of decimal places. For example, DECIMAL(5, 2) represents a number with 5 digits (including both integer and decimal places) and 2 decimal places.
2. Storing values: You can use the INSERT statement to store values in a column of type DECIMAL. For example: INSERT INTO table_name (column_name) VALUES (12.34).
3. Performing numerical calculations: the DECIMAL data type supports various mathematical operations such as addition, subtraction, multiplication, and division. Calculations can be done using the SELECT statement. For example: SELECT column_name1 + column_name2 FROM table_name.
4. Displaying DECIMAL values: You can use the SELECT statement to query columns of type DECIMAL and use formatting functions (such as FORMAT) to display the format of the values. For example: SELECT FORMAT(column_name, 2) FROM table_name.

In general, the DECIMAL data type is suitable for scenarios that require precise calculations, such as the finance industry or other calculations that require maintaining decimal precision.