How data view can be modified?

Can we modify data in view?

You can insert, update, and delete rows in a view, subject to the following limitations: If the view contains joins between multiple tables, you can only insert and update one table in the view, and you can't delete rows. You can't directly modify data in views based on union queries.

How do you modify data?

To modify data involves changing the contents of tables.1Modify data in your database.2Delete rows.3Insert rows.4Update rows.5Privileges on a database and on its objects.6Data integrity.7Interrupted modifications.8Backups and logs with IBM Informix database servers.

Can views be modified in SQL?

Modifying view If you remember the CREATE VIEW SQL syntax, a view can be modified by simply using the ALTER VIEW keyword instead, and then changing the structure of the SELECT statement. Therefore, let's change the previously created view with the CREATE VIEW SQL statement by using the ALTER VIEW statement.

How can data be created and modified?

Key Points1Use CREATE and DROP to create and delete tables.2Use INSERT to add data.3Use UPDATE to modify existing data.4Use DELETE to remove data.5It is simpler and safer to modify data when every record has a unique primary key.6Do not create dangling references by deleting records that other records refer to.