How to use the having statement of mysql

This article mainly explains "how to use the having sentence of mysql". Interested friends may wish to have a look. The method introduced in this paper is simple, fast and practical. Let's let the editor take you to learn how to use the having statement of mysql.

Description

1. It is used to filter the record table returned by the group by statement, usually in conjunction with group by.

2. The existence of having statement makes up for the deficiency that where keyword can not be used in conjunction with aggregate function.

If the select only has a function bar, you don't need the group by clause.

Example

Select playerno, sum (amount) from penaltiesgroup by playernohaving sum (amount) > = all (select sum (amount) from penaltiesgroup by playerno); now that you have a better understanding of "how to use the having statement of mysql", you might as well do it in practice! Here is the website, more related content can enter the relevant channels to inquire, follow us, continue to learn!