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How do I drop a view in PostgreSQL?
The syntax for the DROP VIEW statement in PostgreSQL is: DROP VIEW [IF EXISTS] view_name; view_name. The name of the view that you wish to drop.
How do I delete a specific row in PostgreSQL?
PostgreSQL – DELETE
- First, specify the table from which you want to delete data in the DELETE FROM clause.
- Second, specify which rows to delete by using the condition in the WHERE clause. The WHERE clause is optional. However, if you omit it, the DELETE statement will delete all rows in the table.
Which statement can be used to delete rows in a table based on certain condition?
The DELETE Statement in SQL is used to delete existing records from a table. We can delete a single record or multiple records depending on the condition we specify in the WHERE clause.
Does Postgres cache views?
No. A view is basically a macro – your view definition gets merged with the query against it and then executed.
How to trigger delete from view in PostgreSQL 9.4?
In Postgresql 9.4, we’re doing a view as a UNION of to tables A and B, and we’d like to have a single DELETED N ROWS message when we ‘delete’ the records in the underlying tables (via a a trigger on the view). Here’s more detailed info. Our views look like,
How to drop a view in PostgreSQL documentation?
DROP VIEW drops an existing view. To execute this command you must be the owner of the view. The name (optionally schema-qualified) of the view to remove. Automatically drop objects that depend on the view (such as other views). Refuse to drop the view if any objects depend on it.
How to drop the film Master in PostgreSQL?
To drop the view film_master, you need to drop its dependent object first or use the CASCADE option like this: This statement drops the film_master view as well as its dependent object which is the horror_film. It issued the following notice:
How to drop a view in SQL Server?
The name (optionally schema-qualified) of the view to remove. Automatically drop objects that depend on the view (such as other views). Refuse to drop the view if any objects depend on it. This is the default. This command conforms to the SQL standard, except that the standard only allows one view to be dropped per command.