Mysql view update

After completing the script's writing, click on the Apply button, we will see the following screen:. In this screen, we will review the script and click the Apply button on the database. Finally, click on the Finish button to complete the view creation.

Now, we can verify the view as below:. It allows the user to simplify complex queries. If we are using the complex query, we can create a view based on it to use a simple SELECT statement instead of typing the complex query again. Such type of code makes it easier to integrate with our application. This will eliminate the chances of repeatedly writing the same formula in every query, making the code reusable and more readable.

It also allows us to show only authorized information to the users and hide essential data like personal and banking information. We can limit which information users can access by authoring only the necessary data to them. A view can also enable the backward compatibility in legacy systems.

Suppose we want to split a large table into many smaller ones without affecting the current applications that reference the table. In this case, we will create a view with the same name as the real table so that the current applications can reference the view as if it were a table. JavaTpoint offers too many high quality services. Mail us on [email protected] , to get more information about given services. Please mail your requirement at [email protected] Duration: 1 week to 2 week.

MySQL Tutorial. Reinforcement Learning. R Programming. Examples might be simplified to improve reading and learning. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. While using W3Schools, you agree to have read and accepted our terms of use , cookie and privacy policy.

Copyright by Refsnes Data. Earlier discussion in this section pointed out that a view is not insertable if not all columns are simple column references for example, if it contains columns that are expressions or composite expressions. Although such a view is not insertable, it can be updatable if you update only columns that are not expressions. Consider this view:. This view is not insertable because col2 is an expression. But it is updatable if the update does not try to update col2.

This update is permissible:. InnoDB Cluster. InnoDB ReplicaSet. Defining Stored Programs. Stored Routine Metadata. Event Scheduler Configuration. Finally, to verify the change, we can query the data from the officeInfo view by executing the following query:. The following query gets all views from the classicmodels database and shows which views are updatable.

First, we create a table named items, insert some rows into the items table, and create a view that contains items whose prices are greater than