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The Black Boxes
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What Helps You Learn?
This Friday Steve Jones looks to find out what things help people learn and build skills more readily.
Querying Multiple MySQL Tables
It’s been said that one of the drawbacks to normalization to the third form (3NF) is more cumbersome data extraction due to the greater number of tables. These require careful linking via JOIN clauses. Improper table joining can easily result in erroneous results or even in the dreaded Cartesian Product. In today’s article, Rob Gravelle explores how table joins are achieved in MySQL.
Capture the Flag
A competition among software bots may foretell a vision of the future for software developers.
Monitor up-time and connectivity with Powershell
Use Powershell to troubleshoot SQL connectivity issues. A way to monitor up-time and connectivity of a SQL server database with some simple Powershell commands.
AT TIME ZONE – a new favourite feature in SQL Server 2016
Rob Farley explains why AT TIME ZONE is his new favourite feature in SQL Server 2016, but also shows that it can make a mess of cardinality estimates.
Reading the SQL Server log files using TSQL
The SQL Server Error Log is quite large and it's not always easy to view the contents with the Log File Viewer. Greg Robidoux presents an easy way to search and find errors using T-SQL.
Blogs
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Troubleshooting TempDB Log Full Errors When SSMS Won’t Connect
By gbargsley
Have you ever received the dreaded error from SQL Server that the TempDB log...
Accelerating AI with Confidence: Why Microsoft Purview is Key to Responsible Innovation
By Chris Yates
Artificial intelligence is no longer a distant concept. It is here, embedded in the...
Forums
Bottlenecks on SQL Server performance
We have a BI-application that connects to input tables on a SQL Server 2022...
Is there some good routines for updating SQL Server database objects with GitHub
At work we've been getting better at writing what's known as GitHub Actions (workflows,...
The Tightly Linked View
Comments posted to this topic are about the item The Tightly Linked View
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