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Suppose you have a PostgreSQL database that contains three tables, orders, order_details and customers. The orders table contains basic information about each order, including the order ID and customer ID, customers table contains information about customer, while the order_details table contains the details of each order, including the product ID, quantity, and price. You want to create a view that shows the order ID, customer name, product name, quantity, and price for all orders.

Example of the orders table:

order_idcustomer_idorder_date
112022-03-01
222022-03-02
312022-03-03
432022-03-04

Example of the order_details table:

order_idproduct_idquantityprice
11310.00
22515.00
13220.00
4118.50

Example of the customers table:

customer_idcustomer_namecity
1Laurence Lebihan

London
2Diego Roel

Madrid

Which of the following CREATE VIEW statements would accomplish this?

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Suppose you have two tables in a PostgreSQL database, orders and products. You want to create a view that shows the order ID, product name, and quantity for all orders that include a particular product. Which of the following CREATE VIEW statements would accomplish this?

Table Example:

orders table:

| order_id | product_id | quantity |

|----------|------------|----------|

| 1        | 1          | 3        |

| 2        | 2          | 5        |

| 3        | 1          | 2        |

| 4        | 3          | 1        |

products table:

| id | product_name |

|----|--------------|

| 1  | Widget A     |

| 2  | Widget B     |

| 3  | Widget C     |

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What is the difference between a regular view and a materialized view in PostgreSQL?

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Which of the following cannot be stored in a relational database easily?

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Which database feature ensures data is stored consistently (e.g., all customer emails follow the same format)?

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What is a common advantage of relational databases?

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What is the benefit of using materialized (indexed) views?

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Which type of view combines data from one or more base tables (or views) into a new virtual table?

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