How to distinguish between MYSQL View substitution and aggregation

The following brings you how to distinguish between MYSQL view substitution and aggregation, hoping to bring some help to you in practical application.

MYSQL involves a lot of things, and there are not many theories. There are many books on the Internet. Today, we will use the accumulated experience in the industry to do an answer.

We all know that the view is a virtual table, and the result of the query comes from the base table, so will the view change affect the basic, the difference between MYSQL view substitution and aggregation?

1. View substitution sets merge 2 when creating views, and view instrumentation sets template to materialization by default when creating views

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