Updating views in sql

03-Dec-2017 21:31

For Oracle views you can Google for "updatable join view" for some examples of when you can and cannot update a view.

When a view is created in SQL Server, metadata for the referenced table columns (column name and ordinal position) is persisted in the database.

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-If the view does not have any distinct clause in its definition.A view can contain all rows of a table or select rows from a table.A view can be created from one or many tables which depends on the written SQL query to create a view.Edit: This is MS SQL The rules for updatable join views are as follows: General Rule Any INSERT, UPDATE, or DELETE operation on a join view can modify only one underlying base table at a time.

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UPDATE Rule All updatable columns of a join view must map to columns of a key-preserved table.

For information about generated columns, see Section, “CREATE TABLE and Generated Columns”.