Alter view oracle

The database also invalidates any local objects that depend on the view. If you alter a view that is referenced by one or more materialized views, then those materialized views are invalidated. Invalid materialized views.

ALTER VIEW is not used in this way. Transact-SQL-Syntaxkonventionen Transact-SQL Syntax Conventions. I want to add a column to view.

The following example creates a view that contains all employees and their hire dates called EmployeeHireDate. Permissions are granted. If the view is not in your schema, you can recompile the view with the new name and then drop the old view.

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No, you cannot alter the query of a materialized view without dropping it. Bay hat alles für Sie! VIEW _METADATA Return metadata information about the view to client APIs this allows updatable client-side cursors to address the view.

If a view is dropped and re-create any GRANT or similar permission statements applied to the view must be re-entered. In SQL, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table.

The fields in a view are fields from one or more real tables in the database. CREATE VIEW Statement”). You can add SQL functions, WHERE, and JOIN statements to a view and present the data as if the data were coming from one single table.

Listed below is example SQL generated by the Alter View Tool. Programs are provided to query the view and to delete the view. Beachten Sie bitte, dass es sich hierbei nicht um eine vollständige Liste handelt. Creates a materialized view (also called a snapshot), which is the result of a query run against one or more tables or views. Oder der Datentyp kann z. VARCHAR nach NUMERIC geändert werden, solange es auch nur einen Datensatz gibt, der nicht ausschließlich Zahlenwerte in der Spalte stehen hat.

Spalte mit einem anderen Namen versehen werden. A materialized view , or snapshot as they were previously known, is a table segment whose contents are periodically refreshed based on a query, either against a local or remote table. Using materialized views against remote tables is the simplest way to achieve replication of data between sites.

To clear the whole shared pool you would issue the following command from a privileged user. To drop a column from a table you can use one of these syntax examples, depending on whether you wish to drop a single column (with drop column) or multiple columns. Grundlage ist der Einsatz des XML-Dialekts SXML.

SXML ist eine XML-Repräsentation der.