Column Functions in DB2 Explained with Example

The DB2 COLUMN functions are also known as aggregate functions. These functions take the values from a particular column of multiple rows and return a single value.

Below is the list of some most commonly used COLUMN functions.

The COLUMN function can only be used in the SELECT query. For example, if we have to find the average of all the ORDER_TOTAL for the orders placed on 15-08-2020 from the ORDERS table, then we can use the below query.

Example

SELECT AVG(ORDER_TOTAL) FROM ORDERS
   WHERE ORDER_DATE = ‘15-08-2020’