In database management, an aggregate function or aggregation function, according to Wikipedia, is a function where the values of multiple rows are grouped to form a single summary value.
In database management, an aggregate function or aggregation function, according to Wikipedia, is a function where the values of multiple rows are grouped to form a single summary value.
There are different aggregate functions, such as SUM, COUNT, MAX, MIN, AVG, etc. In this tutorial, we’ll cover the most used aggregate function in detail.
Basically an aggragate function performs a calculation on a set of values, and returns a single value.
Consider the table of author
that we usually use in our SQL tutorials. For illustration we added salary
column.
Author Tabl
Let’s see how it works.
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