Department of Redundancy Department
Ever wonder all the reasons that we use databases instead of file systems? While we don’t think of it too much anymore, the first reason that databases came into existence was to remove redundancies.
2024-04-12
Database Design
2024-01-05
608 reads
2023-11-27
5,799 reads
Having Data Modeling Standards
Today Steve talks about data modeling and how standards can transfer knowledge between developers.
2023-11-22
448 reads
First Normal Form Gets No Respect
Dr. Codd first described the relational model in a paper in Communications of the ACM (CACM 13 No 6; June 1970). Some more work followed up after that by other people, giving us normal forms and other things we have taken for granted for 50+ years.
2023-10-27
Designing Databases for Distributed Systems
Several data management patterns have emerged for microservices and cloud-native solutions. Learn important patterns to manage data in a distributed environment.
2023-10-18
What Is Good Database Design?
Find out how good database design is essential to ensure data accuracy, consistency, and integrity and that databases are efficient, reliable, and easy to use.
2023-10-16
How Would You Design This: Scheduling Classes
One of the challenges for many database developers is coming up with a good design that not only meets the specifications but also performs well in queries. Relational databases often seek some level of normalization, which reduces the update load for a system but might require more effort work from developers to write queries. Many […]
2023-09-22
2,238 reads
How Would You Design This: Tracking Travels
A fun contest from Steve asks you to design a system that tracks travels for a fictitious business.
2023-08-11
1,693 reads
Combine DATE and TIME to DATETIME2 in SQL Server
The most common method on the internet for combining DATE and TIME columns in SQL Server is incorrect. This article demonstrates why that and other methods are incorrect and two lesser known high performance methods that produce correct results even for the "edge cases".
2023-08-07
22,649 reads
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Question of the Day
The Tightly Linked View
I try to run this code on SQL Server 2022. All the objects exist in the database.
CREATE OR ALTER VIEW OrderShipping
AS
SELECT cl.CityNameID,
cl.CityName,
o.OrderID,
o.Customer,
o.OrderDate,
o.CustomerID,
o.cityId
FROM dbo.CityList AS cl
INNER JOIN dbo.[Order] AS o ON o.cityId = cl.CityNameID
GO
CREATE OR ALTER FUNCTION GetShipCityForOrder
(
@OrderID INT
)
RETURNS VARCHAR(50)
WITH SCHEMABINDING
AS
BEGIN
DECLARE @city VARCHAR(50);
SELECT @city = os.CityName
FROM dbo.OrderShipping AS os
WHERE os.OrderID = @OrderID;
RETURN @city;
END;
go
What is the result? See possible answers