The AVG () function calculates the average of the defined records.
Structure:
SELECT avg(column_name) FROM table_name;
Example1:
We have a table Customer with this data:
CustomerID | Name | Hair | Salary |
---|---|---|---|
1 | Alechandro | brown | 100 |
2 | Katerina | blonde | 150 |
3 | Lucie | blonde | 30 |
4 | Thomas | black | 40 |
5 | Theodor | black | 120 |
6 | Thomassino | black | 99 |
7 | Knor | brown | 50 |
8 | Thor | blonde | 10 |
9 | Lucie | pink | 70 |
SELECT avg(salary) FROM Customer;
The result is (100 + 150 + 3O + 40 + 120 + 99 + 50 + 10 + 70) / 9, it is “74.333”.
AVG(NAME) |
---|
74.333 |
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