The role of round in sql

ROUND function is used to round a number to a specified number of decimal places. The syntax is ROUND(number, decimals). Its functions include formatting numbers, calculating based on precision, and creating derived columns with a specified number of decimal places.

The role of ROUND function in SQL

#ROUND function is used to round the specified number to the specified number of decimal places . It accepts two parameters: the number to round and the target number of decimal places.

Syntax

<code class="SQL">ROUND(number, decimals)</code>

Parameters

• number: The number or expression to be rounded Mode.
• decimals: The target number of decimal places to round to. Can be a positive or negative integer.

Rounding Rules

• If the decimal part is 0.5 or greater, the number will be rounded up.
• If the decimal part is less than 0.5, the number will be rounded down.
• If the target number of decimal places is negative, the function will remove numbers with more than the specified number of decimal places.

Examples

Here are some examples of rounding:

##12.34501212.345112.312.345212.3512.345-110

Enter	decimals	Output

##Usage

ROUND function is widely used in the following scenarios:

Format numbers for display.

• Calculate according to the specified precision.
• Create a derived column with a specific number of decimal places.

Note

The decimals argument can contain decimals, allowing for more precise rounding.

• ROUND function does not change the actual value of the input number, it only returns the rounded value.
• For cases where more complex rounding rules are required, consider using other functions such as CEILING or FLOOR.

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