Can we drop a table that has dependent views on it?

Can we drop a table that has dependent views on it?

To empty a table of rows, without destroying the table, use DELETE. (CASCADE will remove a dependent view entirely, but in the foreign-key case it will only remove the foreign-key constraint, not the other table entirely.)

How do you drop a table in Cascade?

In this statement:

1. First, indicate the table and its schema that you want to drop after the DROP TABLE clause.
2. Second, specify CASCADE CONSTRAINTS clause to remove all referential integrity constraints which refer to primary and unique keys in the table.

How do I drop a table with dependencies?

Deleting Tables with dependencies in SQL Server….

1. Select the tables you want to DROP.
2. Select “Save to new query window”.
3. Click on the Advanced button.
4. Set Script DROP and CREATE to Script DROP.
5. Set Script Foreign Keys to True.

What will happen when the following statement is executed DROP TABLE table name?

It completely removes the table structure and associated indexes, statistics, permissions, triggers and constraints. You might have SQL Views and Stored procedures referencing to the SQL table. SQL Server does not remove these stored procedures and views.

Are triggers dropped when table is dropped?

Dropping a table removes the table definition from the data dictionary. All rows of the table are no longer accessible. All indexes and triggers associated with a table are dropped. All views and PL/SQL program units dependent on a dropped table remain, yet become invalid (not usable).

Which command is used to delete all rows from a table?

drop table command
The drop table command is used to delete a table and all rows in the table. To delete an entire table including all of its rows, issue the drop table command followed by the tablename.

What are dropped automatically when table dropped?

The SQL DROP command is used to remove an object (table,view,index) from the database. When you drop a table, all the rows from the table will be deleted with the structure from the database. When a table is dropped, by default all the constraints or triggers associated with the table will be deleted automatically.

Do you have to specify cascade to drop a table?

However, to drop a table that is referenced by a view or a foreign-key constraint of another table, CASCADE must be specified. (CASCADE will remove a dependent view entirely, but in the foreign-key case it will only remove the foreign-key constraint, not the other table entirely.)

How does Cascade remove dependent view in PostgreSQL?

( CASCADE will remove a dependent view entirely, but in the foreign-key case it will only remove the foreign-key constraint, not the other table entirely.) The name (optionally schema-qualified) of the table to drop.

What is the idea of the drop Cascade?

The idea behind DROP CASCADE is to automatically remove the dependent objects. This is documented on the same manual page that the other answer is referring to: CASCADE. Automatically drop objects that depend on the table (such as views).

Can you drop table Authors in PostgreSQL Cascade?

ERROR: cannot drop table authors because other objects depend on it DETAIL: constraint pages_author_id_fkey on table pages depends on table authors HINT: Use DROP CASCADE to drop the dependent objects too.