CREATE VIEW (Transact-SQL) | Microsoft Docs[^]: You can modify the data of an underlying base table through a view, as long as the following conditions are true: * Any modifications, including UPDATE, INSERT, and DELETE statements, must reference columns from only one base table. * The columns being modified in the view must directly reference the underlying data in the table columns. The columns cannot be derived in any other way, such as through the following: * An aggregate function: AVG, COUNT, SUM, MIN, MAX, GROUPING, STDEV, STDEVP, VAR, and VARP. * A computation. The column cannot be computed from an expression that uses other columns. Columns that are formed by using the set operators UNION, UNION ALL, CROSSJOIN, EXCEPT, and INTERSECT amount to a computation and are also not updatable. * The columns being modified are not affected by GROUP BY, HAVING, or DISTINCT clauses. * TOP is not used anywhere in the select_statement of the view together with the WITH CHECK OPTION clause. The previous restrictions apply to any subqueries in the FROM clause of the view, just as they apply to the view itself. Generally, the Database Engine must be able to unambiguously trace modifications from the view definition to one base table. For more information, see Modify Data Through a View[^].
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