What are restrictions in SQL?

What are restrictions on views?

What are the restrictions that views have to follow? - Since a view is a virtual table – columns of the view cannot be renamed. To change anything in the view, the view must be dropped and create again. - When a table or view is dropped, any views in the same database are also dropped.

What are the restrictions that are put on update operations using views?

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.Using Views to Update Data | Creating and Optimizing Views in SQL Server

What are the clauses in SQL?

SQL clausesCONSTRAINT clause.FOR UPDATE clause.FROM clause.GROUP BY clause.HAVING clause.ORDER BY clause.The result offset and fetch first clauses.USING clause.SQL clauses

What restrictions are necessary to ensure that view is updatable?

Rules to write updatable ViewBuilt on only one table.No GROUP BY clause.No HAVING clause.No aggregate functions.No calculated columns.No UNION, INTERSECT, or EXCEPT.No SELECT DISTINCT clause.8 Top Rules to Write Updatable-view - Srinimf