To create a new view in a database, you use the following Oracle CREATE VIEW statement: defining- query . Code language: SQL (Structured Query Language) (sql) The OR REPLACE option replaces the definition of existing view. It is handy …

Use the CREATE VIEW statement to define a view, which is a logical table based on one or more tables or views. A view contains no data itself. The tables upon which a view is based are called base tables.

Oct 24, 2024 · In this article, we will look into the concept of views in PL/SQL, including how to create, update, and drop views, with practical examples to illustrate each operation. What are Views in Oracle PL/SQL? A PL/SQL view is a virtual table produced by a stored query. Unlike the real tables that hold the data, views never save data by themselves.

In SQL, a view is a virtual table based on the result-set of an SQL statement. A view contains rows and columns, just like a real table. The fields in a view are fields from one or more real tables in the database. You can add SQL statements and functions to a view and present the data as if the data were coming from one single table.

Mar 9, 2009 · To create a view use the CREATE VIEW command as seen in this example. This command creates a new view called view_uscustomers. Note that this command does not result in anything being actually stored in the database at all except for a data dictionary entry that defines this view.

In essence, a view is a stored query. You can create views using the CREATE VIEW statement. Each view is defined by a query that references tables, materialized views, or other views. You can also create join views that specify multiple base tables or views in the FROM clause.

In essence, a view is a stored query. This script creates a simple view, replaces the view with a modified view, and drops the view. It also queries the view after it is created and replaced. Create a view on a subset of data in the hr.departments table. The view shows the departments at headquarters (department_id=1700).

The following sections explain how to create, replace, and drop views using SQL commands. Creating Views . Suppose we have EMP and DEPT table. To see the empno, ename, sal, deptno, department name and location we have to give a join query like this. select e.empno,e.ename,e.sal,e.deptno,d.dname,d.loc From emp e, dept d where e.deptno=d.deptno;

This Oracle tutorial explains how to create, update, and drop Oracle VIEWS with syntax and examples. What is a VIEW in Oracle? An Oracle VIEW, in essence, is a virtual table that does not physically exist. Rather, it is created by a query joining one or more tables. The syntax for the CREATE VIEW Statement in Oracle/PLSQL is: SELECT columns.

Views help simplify data retrieval significantly. First, you build a complex query, test it carefully, and encapsulate the query in a view.