Understanding ‘Round’ in SQL Server

Hello Dev, are you looking to enhance your SQL Server skills? If yes, then you have come to the right place. In this article, we will be discussing the ‘Round’ function in SQL Server, and how it can be effectively used in your database operations.

What is the ‘Round’ Function?

The ‘Round’ function is a mathematical function that is used to round off a numerical value to the nearest integer, or to a specific number of decimal points. The function takes two parameters – the first parameter is the numeric value that needs to be rounded, and the second parameter is the number of decimal places to which the value needs to be rounded.

For example, if we have a value of 5.65, and we want to round it off to two decimal places, we can use the ‘Round’ function as follows –

Function	Output
Round(5.65, 2)	5.65

As we can see, the ‘Round’ function has rounded off the value of 5.65 to two decimal places, which is 5.65 itself.

How to Use the ‘Round’ Function?

Using the ‘Round’ function in SQL Server is quite simple. Let us take a look at some examples to understand its usage better –

Example 1 – Rounding off to the Nearest Integer

In this example, we will be rounding off a numeric value to the nearest integer.

Function	Output
Round(5.65, 0)	6

As we can see, the ‘Round’ function has rounded off the value of 5.65 to the nearest integer, which is 6.

Example 2 – Rounding off to a Specific Number of Decimal Places

In this example, we will be rounding off a numeric value to a specific number of decimal places.

Function	Output
Round(5.65789, 2)	5.66

As we can see, the ‘Round’ function has rounded off the value of 5.65789 to two decimal places, which is 5.66.

Example 3 – Rounding off Negative Values

In this example, we will be rounding off a negative numeric value to a specific number of decimal places.

Function	Output
Round(-5.65789, 2)	-5.66

As we can see, the ‘Round’ function has rounded off the negative value of -5.65789 to two decimal places, which is -5.66.

FAQs

Q1. Is the ‘Round’ function only used for rounding off numeric values?

A1. Yes, the ‘Round’ function is primarily used for rounding off numeric values.

Q2. Can the ‘Round’ function be used to round off values to a specific number of significant digits?

A2. No, the ‘Round’ function cannot be used to round off values to a specific number of significant digits.

Q3. What is the difference between the ‘Round’ function and the ‘Floor’ function?

A3. The ‘Round’ function rounds off a numeric value to the nearest integer or to a specific number of decimal places, whereas the ‘Floor’ function rounds off a numeric value to the next lowest integer.

Conclusion

In conclusion, the ‘Round’ function is a powerful mathematical function in SQL Server that can be effectively used to round off numeric values. It is easy to use and can be customized to round off values to the nearest integer or to a specific number of decimal places. We hope that this article has helped you understand the ‘Round’ function better and how it can be used in your database operations.