The ROUND() function is used to round a numeric field to the number of decimals specified.
Note: Some database systems do rounding differently than would typically be considered. Most people assume that the ROUND() function would round to the nearest whole number. However, many DBMS's do "Bankers Rounding". This means that the number being rounded is rounded to the nearest EVEN whole number. I.E. if the number being rounded was 11.3, the logical rounding to most people would be to 11. However, since 11 is odd, "Bankers Rounding" would round this number to 12 instead.
| Parameter | Description |
|---|---|
| column_name | Required. The field to round. |
| decimals | Required. Specifies the number of decimals to be returned. |
In this tutorial we will use the well-known Northwind sample database.
Below is a selection from the "Products" table:
| ProductID | ProductName | SupplierID | CategoryID | Unit | Price |
|---|---|---|---|---|---|
| 1 | Chais | 1 | 1 | 10 boxes x 20 bags | 18 |
| 2 | Chang | 1 | 1 | 24 - 12 oz bottles | 19 |
| 3 | Aniseed Syrup | 1 | 2 | 12 - 550 ml bottles | 10 |
| 4 | Chef Anton's Cajun Seasoning | 2 | 2 | 48 - 6 oz jars | 21.35 |
| 5 | Chef Anton's Gumbo Mix | 2 | 2 | 36 boxes | 25 |
The following SQL statement selects the product name and rounds the price in the "Products" table:
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