SQL ALTER TABLE Statement. I have created a view that is based on another view and a table. The ALTER TABLE statement is also used to add and drop various constraints on an existing table. I want to add new column of type varchar. I did like below, But getting syntax error?
How to add columns to a view in SQL.
Modifies a previously created view. This includes an indexed view. ALTER VIEW does not affect dependent stored procedures or triggers and does not change permissions. In this syntax, you specify a comma-separated list of columns that you want to add to a table after the ADD clause. The following statement creates a new table named sales.
Security Permissions. To execute ALTER VIEW , at a minimum, ALTER permission on OBJECT is required. In Object Explorer, click the plus sign next to the database where your view is.
Using the ALTER TABLE statement to add columns to a table automatically adds those columns to the end of the table. However, note that this is not a database design best practice. Best practice is to specify the order in which the columns are returned at. How To Modify the Underlying Query of an Existing View ? And if so, how to do that?
Thanks in advance for any help. The ALTER VIEW statement regenerates a view using an existing view definition at the current server. ALTER VIEW is primarily used during DBmigration or when DBmaintenance is applied. Can anybody please help me out from this. I already try to replace this but it had shown some nothing.
Oracle ALTER TABLE ADD column examples. Let’s create a table named members for the demonstration. You may want to recompile a view explicitly after altering one of its base tables to ensure that the alteration does not affect the view or other objects that depend on it. You can also use ALTER VIEW to define, modify, or drop view constraints. To achieve the above objective, the easiest way is to add a column with a default constraint.
When the default column is adde the default value will be added to the table. 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.
Der Befehl ALTER TABLE wird auch bei anderer Gelegenheit verwendet, beispielsweise zum Ändern der Primärschlüsseldefinition. CREATE VIEW Statement”).
Keine Kommentare:
Kommentar veröffentlichen
Hinweis: Nur ein Mitglied dieses Blogs kann Kommentare posten.