¿Puedes crear una vista desde una vista SQL?

Can you create a view from a view SQL?

2 Answers. You can certainly have a view that’s built on top of another view: create table my_table (id number, name varchar2(20), address varchar2(30)); table MY_TABLE created.

SQL Server CREATE VIEW

1. First, specify the name of the view after the CREATE VIEW keywords. The schema_name is the name of the schema to which the view belongs.
2. Second, specify a SELECT statement ( select_statement ) that defines the view after the AS keyword. The SELECT statement can refer to one or more tables.

How to create a view in SQL with a single table

1. CREATE VIEW view_name AS.
2. SELECT column1, column2.
3. FROM table_name.
4. WHERE condition;

Yes, View Is Virtual table. In simple view We create view on single base table That’s why we can perform all DML operations.it also called as Updatable view. But In case of Complex view We create view on multiple base tables that’s why we cannot perform DML operations It is ReadOnly View (Only Select Operation).

BEFORE and AFTER triggers fired by DML statements can be defined only on tables, not on views. However, triggers on the base tables of a view are fired if an INSERT , UPDATE , or DELETE statement is issued against the view.

INSTEAD OF triggers provide a transparent way of modifying views that cannot be modified directly through DML statements ( INSERT , UPDATE , and DELETE ). These triggers are called INSTEAD OF triggers because, unlike other types of triggers, Oracle fires the trigger instead of executing the triggering statement.

Force VIEW Creation This keyword is used to create a View even if the table does not exist. After creating a force View if we create the base table and enter values in it, the view will be automatically updated.

A VIEW in SQL Server is like a virtual table that contains data from one or multiple tables. It does not hold any data and does not exist physically in the database. Similar to a SQL table, the view name should be unique in a database. It contains a set of predefined SQL queries to fetch data from the database.

Expand database -> Views -> Right click and go to Script view as -> Create To -> New Query Editor Window. Suppose we have a VIEW on a table that specifies select * statement to get all columns of that table.

SQL View – A complete introduction and walk-through. July 1, 2019 by Rajendra Gupta. In relational databases, data is structured using various database objects like tables, stored procedure, views, clusters etc. This article aims to walk you through ‘SQL VIEW’ – one of the widely-used database objects in SQL Server.

By dint of a SQL Expression in, say, a View, you can make that view dependent on one or more other objects.