Mathematical Calculation Functions

This section describes mathematical calculation functions, including their syntax, parameters, and usage examples.

**Table 1** Mathematical calculation functions
Function	Description
round	Rounds a number (x). If n is specified, it rounds x to n decimal places. If n is not specified, it rounds x to the nearest integer.

This function rounds a number (x). If n is specified, it rounds x to n decimal places. If n is not specified, it rounds x to the nearest integer.

**Table 2** Parameter description
Parameter	Description	Type	Mandatory
x	Original field.	Double	Yes
n	Number of decimal places (integer).	Integer	Yes

Return value type: double

Example: select round(num,4)

Example number: 3.1415926

**Table 3** Query and analysis results
Type	Query Statement	Returned Result
Scenario	select round(num,4)	3.1416

Parent topic: SQL Functions

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