How can I create a view that merges different columns with a different table? I have three tables for example: users, items and gifts (in this example it's a system that a user can give a gift to another user)
users
table has information about users, items
table has information about items and gifts
table shows which user sent what gift to which user.
What I want is to create a view like following:
user_from | user_to | gift_name | gift_price
sally | john | Teddy Bear | 10
You can create a view that combines data from two or more tables by naming more than one table in the FROM clause. In the following example procedure, the INVENTORY_LIST table contains a column of item numbers called ITEM_NUMBER and a column of item cost called UNIT_COST.
Views can use joins to select data from numerous sources like tables, table functions, or even other views.
Use a join view to run tests on several related columns across different tables. You can create a join view instead of multiple SQL views with joins. For example, the Employee table has employee details, Inventory table has sales details, and the customer table has customer details.
You must join the three tables first. Example
CREATE VIEW GiftsList
AS
SELECT b.name user_from,
c.name user_to,
d.name gift_name,
d.price gift_price
FROM gift a
INNER JOIN users b
ON a.user_from = b.id
INNER JOIN users c
ON a.user_from = c.id
INNER JOIN items d
ON a.item = d.id
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