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Anonymous Asked in Cars &Transportation · 2 weeks ago

What restrictions are necessary to ensure that view is updatable?

Contents
  1. How can you tell if a view is updatable?
  2. How do you make a updatable view?
  3. How do you make a view not updatable?
  4. What are the limitations of a view?
Rules to write updatable View Built 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.


How can you tell if a view is updatable?

Checking updatable view information You can check if a view in a database in updatable by querying the is_updatable column from the views table in the information_schema database.

How do you make a updatable view?

However, to create an updatable view, the SELECT statement that defines the view must not contain any of the following elements:1Aggregate functions such as MIN, MAX, SUM, AVG, and COUNT.2DISTINCT.3GROUP BY clause.4HAVING clause.5UNION or UNION ALL clause.6Left join or outer join.

How do you make a view not updatable?

To be more specific, a view is not updatable if it contains any of the following:1Aggregate functions ( SUM() , MIN() , MAX() , COUNT() , and so forth)2DISTINCT.3GROUP BY.4HAVING.5UNION or UNION ALL.6Subquery in the select list.7Certain joins (see additional join discussion later in this section)

What are the limitations of a view?

Limitations When Working with SQL Server ViewsYou cannot pass parameters to SQL Server views.Cannot use an Order By clause with views without specifying FOR XML or TOP.Views cannot be created on Temporary Tables.You cannot associate rules and defaults with views.

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