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Updating table from a view in sql Fucksex girl house

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If a row is rejected because of the CHECK OPTION, an error similar to the following is produced: ) and WITH CHECK OPTION is similar to a BLACKHOLE table: no row is ever inserted and no row is ever returned.

An insertable view with a WHERE which is always false but no CHECK OPTION is a view that accepts data but does not show them.

Maria DB stores an IS_UPDATABLE flag with each view, so it is always possible to see if Maria DB considers a view updatable (although not necessarily insertable) by querying the IS_UPDATABLE column in the INFORMATION_SCHEMA. The WITH CHECK OPTION clause is used to prevent updates or inserts to views unless the WHERE clause in the SELECT statement is true. WITH LOCAL CHECK OPTION restricts the CHECK OPTION to only the view being defined, while WITH CASCADED CHECK OPTION checks all underlying views as well.

CASCADED is treated as default if neither keyword is given.

As you read this article you will find that views are very useful when implemented wisely, but can be an administrative burden if implemented without planning.

In most cases, when using Transact-SQL to modify data in a SQL Server database, you issue an UPDATE statement that changes specific values.

You can issue an UPDATE statement against a table or updateable view, as long as the statement modifies data in only one base table at a time.

Mullins Views are a very useful feature of relational technology in general, and Microsoft SQL Server specifically.

They are wonderful tools that ease data access and system development when used prudently.