A view is a virtual table and can be used as a table in any query. A view can include data from one or more base tables and it can also contain calculated columns, which are derived from the data in other columns. Views are very useful for summarizing large amounts of data, filtering unwanted data and hiding unwanted details.
Sql Create View From Multiple Tables
Create view from multiple tables:
CREATE VIEW `Projects` AS
SELECT id, name FROM project;
Create a view that is the combination of two tables in Oracle:
CREATE OR REPLACE VIEW Sales_Tables AS (SELECT * FROM sales_fact);
This is a simple example of how to create a view that is the combination of two tables.
CREATE VIEW myTableView AS
SELECT * FROM myTable1;
SELECT * FROM myTable2;
You can create a view in SQL by specifying the SELECT statement for the view. The SELECT statement must include columns from at least one table, but not all the columns from that table.
If you want to create a view from multiple tables, you must combine them using UNION ALL or UNION. You can also use UNION DISTINCT if your tables have duplicate rows.
For example:
SELECT * FROM table1 UNION ALL
SELECT * FROM table2
1. Create a view to combine two tables
CREATE VIEW sales_view AS SELECT * FROM sales_table;
2. Create a view to combine three tables
CREATE VIEW sales_view AS SELECT * FROM sales_table, customers, products;
CREATE VIEW student_info AS
SELECT * FROM student_details;
CREATE VIEW grade_report AS
SELECT grade, name, id FROM student_info;
create view union_view AS
SELECT * FROM table1 UNION ALL SELECT * FROM table2;
create view v_union as
select * from table1 union all select * from table2
The above query will create a view named “v_union”. Here, the view will contain all the records from both table1 and table2.
Let’s assume we have two tables: Customers and Orders. The Customers table has the following columns: id, name, address and city
Orders table has the following columns: id, customer_id, date_ordered, date_shipped and amount
CREATE VIEW [employee] AS SELECT * FROM EMPLOYEE;
CREATE VIEW [employee]_1 AS SELECT * FROM EMPLOYEE;
SELECT * FROM EMPLOYEE;
I have two tables with the same structure as below:
CREATE TABLE `tbl_training` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
`name` VARCHAR(200) NOT NULL,
PRIMARY KEY (`id`),
KEY `name` (`name`)) ENGINE=MyISAM DEFAULT CHARSET=utf8;
CREATE TABLE `tbl_programs` (
`id` INT(11) NOT NULL AUTO_INCREMENT,
PRIMARY KEY (`id`),
KEY `programs_idx1`.