How do I update a view in MySQL?

How do I edit a view in MySQL?

To edit View:

  1. Click on your View in table list.
  2. Click on Structure tab.
  3. Click on Edit View under Check All.

How can we update a view in SQL?

To modify table data through a view

  1. In Object Explorer, expand the database that contains the view and then expand Views.
  2. Right-click the view and select Edit Top 200 Rows.
  3. You may need to modify the SELECT statement in the SQL pane to return the rows to be modified.

Can you update views?

Answer: A VIEW in SQL is created by joining one or more tables. When you update record(s) in a view, it updates the records in the underlying tables that make up the SQL View. So, yes, you can update the data in a SQL VIEW providing you have the proper privileges to the underlying SQL tables.

Do views update automatically MySQL?

Yes, Views automatically update in MySQL; including, but not limited to: Changing table structures. Insert/Update/Delete procedures on Tables. Changing View structures using CREATE OR REPLACE VIEW.

Is updatable MySQL view?

Introduction to MySQL updatable views

In MySQL, views are not only query-able but also updatable. It means that you can use the INSERT or UPDATE statement to insert or update rows of the base table through the updatable view.

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Can we rename view in MySQL?

In MySQL, views and tables share the same namespace. Therefore, you can use the RENAME TABLE statement to rename a view.

How do you write a trigger?

create trigger [trigger_name]: Creates or replaces an existing trigger with the trigger_name. [before | after]: This specifies when the trigger will be executed. {insert | update | delete}: This specifies the DML operation. on [table_name]: This specifies the name of the table associated with the trigger.

What is updatable view?

An updatable view is a special case of a deletable view. A deletable view becomes an updatable view when at least one of its columns is updatable. … The column resolves to a column of a table (not using a dereference operation) and the READ ONLY option is not specified.

What are after triggers?

An after trigger runs after the corresponding insert, update, or delete changes are applied to the table. The WHEN condition can be used in an SQL trigger to specify a condition. If the condition evaluates to true, the SQL statements in the SQL trigger routine body are run.

Do views update automatically?

Yes, they are updated, every time you use them. I think Microsoft sums up what a View is quite clearly: A view can be thought of as either a virtual table or a stored query. Views are not automatically cached.

What happens when you update a view?

The view is, in essence, a stored SELECT statement that masquerades as a table. The data is stored in the original tables and only “assembled” into the view when you want to look at it. If the view is updateable (not all views are) the updates are applied to the table data.

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What are the conditions under which views can be updated?

A view can be updated under certain conditions: The SELECT clause may not contain the keyword DISTINCT. The SELECT clause may not contain summary functions. The SELECT clause may not contain set functions. The SELECT clause may not contain set operators.

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