Sql updating identity column
It's great to get the extra features, but it makes it harder to nail down exactly what you can and cannot do with views.
Views have never in the past been able to contain parameters; however, as shown later in the chapter, user-defined functions can now be used like views, effectively allowing you to create parameterized views that return different results depending on the parameter values that get passed in each time the function is run.
Views give you a mechanism for presenting the same data to different users in different ways. As long as both the view and the Customers table are owned by dbo, the permissions granted on the view will take precedence over permissions removed from the Customers table. Because views allow you to restrict the rows and columns that are available, using them as a security tool is very convenient.
Columns and rows can be restricted, allowing users to focus on specific data that interests them. This also helps network performance because less data is traveling over the wire to client applications. For example, you could create two views on an Employees table, one with a sensitive salary column included that only managers had permissions on, and a second view with that column omitted for everyone else.
Using a view to filter data on the server is much more efficient than fetching an entire table and then applying a filter on the client. One reason it's recommended that the dbo own all objects in a database is that problems arise when the chain of ownership is broken.
To restrict the rows in a view, you use the same kinds of criteria in a clause. This happens when the view and the underlying table do not have the same owner.
Unfortunately this is part of a much larger project. Forgive me if this shouldn't be logged here or I have done something stupid, publishing migrations doesn't seem to apply the Identity flag to a column but only on Sql Server. Migrations are currently only generated based on the active provider (SQLite).
Another limitation of views that you may be familiar with is that a view cannot be indexed. In SQL Server 2000, you can indeed create indexed views, as shown later in this chapter. Tools: 1.0.0-preview2-final Operating system: Windows Server 2008 R2 Visual Studio version: (e.g.In "Working with Variables in T-SQL, Part 1," January 2002, I explained how to declare and assign values to local variables in T-SQL.To return the top 10 customers or the top 10% of customers, based on sales over the past year, SQL Server needs to sort customers by sales.So, a view that returns the top 100% by sales would essentially be a sorted view.
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When a user selects data from the view, only the result set is passed over the network—all of the joins and aggregations are performed on the server, not on the client. Then grant appropriate permissions on the views for the users and roles you want to be able to access the data.