Updating a join view oracle ukrainian dating ru
CREATE VIEW sup_orders AS SELECT suppliers.supplier_id, orders.quantity, orders.price FROM suppliers INNER JOIN orders ON suppliers.supplier_id = orders.supplier_id WHERE suppliers.supplier_name = 'Microsoft'; CREATE or REPLACE VIEW sup_orders AS SELECT suppliers.supplier_id, orders.quantity, orders.price FROM suppliers INNER JOIN orders ON suppliers.supplier_id = orders.supplier_id WHERE suppliers.supplier_name = 'Apple'; A VIEW in Oracle is created by joining one or more tables.
When you update record(s) in a VIEW, it updates the records in the underlying tables that make up the View.
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For example, you could create a view for a salesperson that only displays her own orders, or you might create a view for the manager, who is only interested in seeing the total sales for each salesperson. Figure 9.1 shows the Permissions dialog box for vw Customeraddress List.
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.
Assuming you're not breaking the rules for updateable views, then you should be okay.
Typically, it does a good job with this, so the update view plan may look very similar to a plan for a simple update to the single affected base table. Then read this blog I wrote recently to see how it could be affected.
The primary use of views is to present data to users of an application.
Views can be used in place of tables in your Access front-end application, whether you're using an Access database or an Access project.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.Views still, however, don't allow you to perform any of the other major SQL actions besides selecting—views can't contain syntax when defining a view. id Data, -- PK of main table tab Data fi SL, fi Model, fi Claim Status -- FK to dim Claim Status FROM tab Data AS d INNER JOIN loc SL AS sl ON SL = SL INNER JOIN loc GSP AS gsp ON GSP = GSP INNER JOIN loc Country AS c ON Country = Country INNER JOIN loc Market Unit AS mu ON Market Unit = Market Unit INNER JOIN mod Model AS m ON Model = Model INNER JOIN dim Claim Status AS s ON Claim Status = Claim Status INNER JOIN tdef Product Type ON Product Type = tdef Product Product Type LEFT OUTER JOIN tdef Service Level ON d.fimax Service Level = tdef Service Service Level LEFT OUTER JOIN tdef Action Code AS ac ON d.fimax Action Code = Action Code UPDATE tab Data SET fi Claim Status = (SELECT id Claim Status FROM dim Claim Status WHERE Claim Status Name = 'Awaiting auth.') WHERE fi Claim Status=(SELECT id Claim Status FROM dim Claim Status WHERE Claim Status Name = 'Approved') updatable in practice, due to limitations of the query processor's reasoning.UPDATE dest_tab tt SET (tt.code, tt.description) = (SELECT st.code, st.description FROM source_tab st WHERE = tt.id) WHERE EXISTS (SELECT 1 FROM source_tab WHERE id = tt.id); 5000 rows updated.The SQL-92 standard also mandates that views cannot be sorted with an values with a view; to support that, it also supports sorting.Tags: Adult Dating, affair dating, sex dating