Review
So you think you can count?
Rounding functions and more
16. Numeric functions: ROUND()
Review and practice

Instruction

Good! Now that you know how to subtract and divide in T-SQL, we'll talk about some other numeric functions. One of them is ROUND(), which looks like this:

ROUND(value, precision)

This function will round the number (the first parameter) to the nearest numeric value, using the precision specified by the second parameter. Its default is standard mathematical rounding: anything equal to or greater than 0.5 will be rounded up to the next whole number.

Let's look at ROUND() in action:

SELECT
  ROUND(AccountBalance, 0) AS Round
FROM Character
WHERE Id = 1;

The above query will take the AccountBalance of the character with Id = 1 (the AccountBalance is 899.34) and round it to the nearest integer (899.00). Remember that ROUND() won't change the type of the value returned.

Exercise

For each character, show its Name, its actual AccountBalance, and its AccountBalance rounded to the nearest integer. Name the column IntegerBalance. Notice how mathematical rounding is applied.