Updating sql view
Here, we cannot insert rows in the CUSTOMERS_VIEW because we have not included all the NOT NULL columns in this view, otherwise you can insert rows in a view in a similar way as you insert them in a table. The same rules that apply to the UPDATE and INSERT commands apply to the DELETE command.
Following is an example to delete a record having AGE = 22.
This article will start from the basics of creating indexed views, and the underlying requirements in order to do so, and then discuss their advantages and the situations in which they can offer a significant boost to query performance.
We’ll also consider the potential pitfalls of which you need to be aware before deciding to implement an indexed view. Unfortunately, however, applications grow more complex as the users demand new features, and so the accompanying queries grow more complex also.
We don’t always have time to rewrite a query completely, or may not even know a better way to write it. When we encapsulate complex multi-table query logic in a view, any application that needs that data is then able to issue a much simpler query against the view, rather than a complex multi- permissions on the view, rather than the underlying tables, and use the view to restrict the columns and rows that are accessible to the user.
We can use views to aggregate data in a meaningful way.
Let’s say we need to run various queries against the database to return information regarding items that customers have purchased.
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The following code block has an example of creating same view CUSTOMERS_VIEW with the WITH CHECK OPTION.