Contents
Are views read only by default?
Unlike base tables, VIEW s are either updatable or read-only, but not both. INSERT , UPDATE , and DELETE operations are allowed on updatable VIEW s and base tables, subject to any other constraints.
What is the use of view in Oracle?
Answer: A VIEW in Oracle is created by joining one or more tables. When you update record(s) in a VIEW, it updates the records in the underlying tables that make up the View. So, yes, you can update the data in an Oracle VIEW providing you have the proper privileges to the underlying Oracle tables.
How to create a read only view in SQL?
Creating a View with a READ ONLY Constraint : Create View « View « Oracle PL/SQL Tutorial. You can make a view read only by adding a READ ONLY constraint to the view. SQL> — create demo table SQL> create table Employee ( 2 ID VARCHAR2 (4 BYTE) NOT NULL, 3 First_Name VARCHAR2 (10 BYTE), 4 Last_Name VARCHAR2 (10 BYTE), 5 Start_Date DATE,
Which is the best definition of read only?
: capable of being viewed but not of being changed or deleted a read-only file/document Learn More About read-only
How to create a view with a read only constraint?
SQL> SQL> SQL> CREATE VIEW myView AS 2 SELECT * 3 FROM employee 4 WITH READ ONLY CONSTRAINT my_view_read_only; View created. SQL> SQL> INSERT INTO myView (id) VALUES (1); INSERT INTO myView (id) VALUES (1) * ERROR at line 1: ORA-01733: virtual column not allowed here SQL> SQL> drop view myView; View dropped.
Can a sysadmin update a read only view?
As long as DENY permissions were not placed on the view for the sysadmin to update then the sysadmin would still be able to update. An explicit DENY for the sysadmin would prevent this, but that would be overkill since all that is required for the other roles is an implicit DENY, or just not granting the ALLOW for a transaction.