Refreshing review in SQL

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Refreshing review in SQL

rinu.gour123

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Points: 53
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January 11, 2019 at 4:51 am

#379017

How we can refresh the view?

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andreas.kreuzberg SSCertifiable Points: 6183 More actions · Answer 1

Hi
every time you select something from a view, it is fresh.
The sql server ist able to create a "static" view:
https://docs.microsoft.com/en-us/sql/relational-databases/views/create-indexed-views?view=sql-server-2017
The the default view is created every time you select something.
Kind regards,
Andreas

Grant Fritchey SSC Guru Points: 398697 More actions · Answer 2

Except for materialized views (more on that in a moment), a view is just a query. Yes, it looks and acts like it's a table. It's not. It's just a query. It's a convenient way to mask or format data within a query that can then be consumed as if it was a table. However, it's always just a query. So, there's nothing to refresh. Just as running SELECT * FROM Table doesn't require any special magic to get the data, so SELECT * FROM View does not either.

Now, a materialized view, or an indexed view, is different. In this case you've taken what was just a query and turned it into a clustered index, a new table. However, even that is updated regularly as the data in the original underlying tables gets updated. No need to do a special refresh. They do have a bunch of special requirements which prevents them from being used in some situations, but you can read about that in the documentation.

This is different behavior than a materialized view in Oracle. Maybe that's what you're thinking about.

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saneepatel123 Grasshopper Points: 18 More actions · Answer 3

We can use SQL CREATE and REPLACE for refreshing the view.
Syntax:

CREATE OR REPLACE VIEW view_name AS
SELECT column_name(s)
FROM table_name
WHERE condition