SQL MAX function returns the biggest data record value from the specified column.
Syntax of SQL MAX
Example
SELECT MAX(col_name)
FROM tbl_name
WHERE conditions;Demo Database
The demo database we'll use in our examples is called Products:
| ID | Name | Supplier_ID | Category_ID | Unit | Price | Unit_in_stock | Unit_on_order |
|---|---|---|---|---|---|---|---|
| 1 | Cucumber | 3 | 3 | 5 crates | 19 | 17 | 16 |
| 2 | Tomato | 3 | 3 | 6 crates | 20 | 24 | Null |
| 3 | Cheese | 3 | 4 | 5 kg boxes | 11 | 11 | 6 |
| 4 | Milk | 4 | 4 | 5 L bottles | 22 | 56 | 12 |
| 5 | Bread | 4 | 4 | 36 boxes | 26 | 26 | 1 |
SQL MAX Example
The code example below pick out the biggest 'PriceID' data record value in the table Products: