📅  最后修改于: 2023-12-03 14:39:24.539000             🧑  作者: Mango
In MySQL, the AVG function is used to calculate the average value of a specific column in a table.
The syntax for using AVG in MySQL is as follows:
SELECT AVG(column_name) FROM table_name;
Suppose we have a table named students
, and we want to calculate the average age of all the students. We can use the AVG function as follows:
SELECT AVG(age) FROM students;
This will return a single value, which is the average age of all the students in the table.
It is important to note that the AVG function in MySQL ignores NULL values. If a column contains NULL values, those values will not be included in the calculation of the average.
The AVG function in MySQL is a powerful tool for calculating the average value of a specific column in a table. Whether you are working with large datasets or small ones, the AVG function can help you get the information you need quickly and efficiently.