- What is updatable view?
- What is Oracle trigger?
- What is a data view?
- Can we update synonym in Oracle?
- Can we insert data in view?
- How do you insert data into a table?
- What are the 12 types of triggers in Oracle?
- Can we write trigger for view?
- How do I view a SQL query?
- What does Oracle mean?
- Can we write trigger on view in Oracle?
- Are views stored in database?
- Can you update the data in an Oracle view?
- What is a synonym in Oracle?
- Can we update the view in SQL?
- What is difference between view and table?
- Can we insert data into synonym in Oracle?
- What is an Oracle view?
What is updatable view?
An updatable view is a special case of a deletable view.
A column of a view is updatable when all of the following rules are true: …
The view is deletable.
The column resolves to a column of a table (not using a dereference operation) and the READ ONLY option is not specified..
What is Oracle trigger?
An Introduction to Triggers Oracle allows you to define procedures that are implicitly executed when an INSERT, UPDATE, or DELETE statement is issued against the associated table. … A trigger can include SQL and PL/SQL statements to execute as a unit and can invoke stored procedures.
What is a data view?
A data view is a data structure or visual representation of data that differs from physical data. Views are often created to make information more relevant, readable and interesting for human consumption.
Can we update synonym in Oracle?
Use the ALTER SYNONYM statement to modify an existing synonym. To modify a private synonym in another user’s schema, you must have the CREATE ANY SYNONYM and DROP ANY SYNONYM system privileges. … If you omit schema , then Oracle Database assumes the synonym is in your own schema.
Can we insert data in view?
You can insert, update, and delete rows in a view, subject to the following limitations: If the view contains joins between multiple tables, you can only insert and update one table in the view, and you can’t delete rows. You can’t directly modify data in views based on union queries.
How do you insert data into a table?
To insert records into a table, enter the key words insert into followed by the table name, followed by an open parenthesis, followed by a list of column names separated by commas, followed by a closing parenthesis, followed by the keyword values, followed by the list of values enclosed in parenthesis.
What are the 12 types of triggers in Oracle?
Types of Triggers in OracleDML Trigger: It fires when the DML event is specified (INSERT/UPDATE/DELETE)DDL Trigger: It fires when the DDL event is specified (CREATE/ALTER)DATABASE Trigger: It fires when the database event is specified (LOGON/LOGOFF/STARTUP/SHUTDOWN)
Can we write trigger for view?
By using INSTEAD OF triggers, we can change the behavior of INSERT, UPDATE and DELETE statements for a given view. In other words, we can perform certain validations before making a change to the data. With the combination of a view and a trigger you can create row and cell level security on tables.
How do I view a SQL query?
Using SQL Server Management StudioIn Object Explorer, click the plus sign next to the database that contains the view to which you want to view the properties, and then click the plus sign to expand the Views folder.Right-click the view of which you want to view the properties and select Properties.
What does Oracle mean?
The definition of an oracle is a person with great wisdom or someone believed to have communication with a deity. An example of an oracle is someone who has conversations with God. noun.
Can we write trigger on view in Oracle?
Yes, you can create a trigger on any view. Logically it points to the base table of the view. Guys..you are welcome to the open chat discussions on Oracle.
Are views stored in database?
A view is a virtual table whose contents are defined by a query. Like a table, a view consists of a set of named columns and rows of data. Unless indexed, a view does not exist as a stored set of data values in a database.
Can you update the data in an Oracle view?
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.
What is a synonym in Oracle?
Introduction to Oracle CREATE SYNONYM statement The CREATE SYNONYM statement allows you to create a synonym which is an alternative name for a database object such as a table, view, sequence, procedure, stored function, and materialized view. … If you skip the schema, Oracle will create the synonym in your own schema.
Can we update the view in SQL?
The SQL UPDATE VIEW command can be used to modify the data of a view. All views are not updatable. … An updatable view is one which allows performing a UPDATE command on itself without affecting any other table.
What is difference between view and table?
A view is a virtual table. A view consists of rows and columns just like a table. The difference between a view and a table is that views are definitions built on top of other tables (or views), and do not hold data themselves. If data is changing in the underlying table, the same change is reflected in the view.
Can we insert data into synonym in Oracle?
A synonym is not a “real” object, but simply a pointer to an object; so, whatever you do on a synonym, you are doing on the referred object. … SQL> insert into my_synonym values (1); 1 row created. … or using schema.
What is an Oracle view?
In Oracle, view is a virtual table that does not physically exist. It is stored in Oracle data dictionary and do not store any data. It can be executed when called. A view is created by a query joining one or more tables.