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Posted by / 11-Sep-2019 14:32

The plan shown will also show you how much of the view definition the query optimizer was able to remove (because it is redundant). Requesting a "estimated" plan does not involve executing the query, naturally.The following is the syntax for creating views (in its simplest form): Schema: Is the name of the schema to which the view belongs. The statement can use more than one table and other views.

During College it was banged into our heads to not update tables through views, and again when I got into the workplace we where told do not update the database through views.

The basic CREATE VIEW syntax is as follows − ---- ---------- ----- ----------- ---------- | ID | NAME | AGE | ADDRESS | SALARY | ---- ---------- ----- ----------- ---------- | 1 | Ramesh | 32 | Ahmedabad | 2000.00 | | 2 | Khilan | 25 | Delhi | 1500.00 | | 3 | kaushik | 23 | Kota | 2000.00 | | 4 | Chaitali | 25 | Mumbai | 6500.00 | | 5 | Hardik | 27 | Bhopal | 8500.00 | | 6 | Komal | 22 | MP | 4500.00 | | 7 | Muffy | 24 | Indore | 10000.00 | ---- ---------- ----- ----------- ---------- The WITH CHECK OPTION is a CREATE VIEW statement option.

The purpose of the WITH CHECK OPTION is to ensure that all UPDATE and INSERTs satisfy the condition(s) in the view definition.

In Enterprise applications, we find that there are numerous tables and those may be normalized.

So data to be inserted for a "Business Entity" may be split into various tables as part of normailzation.

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you're not breaking the rules for updateable views, then you should be okay.

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