Database view (MySQL, sql server)
The basic concept of the view, the role of the view, create a view instance, delete and modify the view.
1. The basic concept of view
A view is a virtual table. The fields of the view are defined by us. The view is only for query, and the data cannot be changed. The query data source comes from the entity table we established.
Views can combine multiple complex and related tables to extract the information we need and optimize query speed.