How to reuse complex queries with CREATE VIEW | Essential SQL
May 11, 2024
Learn how to create a SQL view so you can reuse your complex queries in your SQL Server, PostgeSQL, and MySQL databases.
More importantly watch until the end if you want to know how do a case insensitive replacement in PostgreSQL.
One Last Thing...
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Important links:
Sample PizzaDB: https://github.com/kwenzel1/EssentialSQLSamples/tree/master/PizzaDB
Corresponding Article: https://www.essentialsql.com/sql-coalesce-function-and-null/
Source Code:
--First Query
select o.CustomerOrderID, o.OrderDate, c.CustomerID, c.LastName,
Sum(i.Quantity * p.Price) OrderPrice,
cast(Sum(i.Quantity * p.Price) * isnull(cp.PercentDiscount ,0) / 100.0 as numeric(14,2)) DiscountAmount,
cast(Sum(i.Quantity * p.Price) * (1.00 - (isnull(cp.PercentDiscount ,0) / 100.0)) as numeric(14,2)) FinalOrderPrice
from CustomerOrder o
inner join Customer c on o.CustomerID = c.CustomerID
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