Articles

SQLServerCentral Article

15 Quick Short Interview Questions Useful When Hiring SQL Developers

Here is a useful exam that you can administer in either 10 or 15 minutes, either oral or written, when you interview for hiring permanent or contract workers for jobs in SQL Server development or support. (This is not a test for SQL Data Base Administrators.)

4.59 (56)

You rated this post out of 5. Change rating

2014-12-25 (first published: )

15,581 reads

External Article

SQL Server Data Aggregation for Data with Different Sampling Rates

In the emerging "Internet of Things", there are multitudes of devices collecting data at differing sampling rates. Integrating this data so the data has a common granularity in time is important to not only allow for accurate analysis and mining, but it will also aid in reducing the amount of data to be stored and processed.
In this tip, we will demonstrate how to use the T-SQL AVG function and GROUP BY clause to transform data collected from two devices sampling at 100Hz and 40Hz to one row per second.

2014-12-24

7,922 reads

External Article

Practical PowerShell Unit-Testing: Mock Objects

Pester allows you to automate the testing of PowerShell scripts. It can test the output of a function as you develop it by validating simple data (scalars) and arrays, and allows you to focus on the one function you want to test by using 'mocking' to fake all the other functions and Cmdlets.

2014-12-23

7,027 reads

External Article

The Big Database Freeze

When a hospital’s mission-critical database fails at Christmas, disaster for the hospital – and its hapless DBA – seems certain. With less than an hour to spare before catastrophe, can the DBA Team save the day? This is a fictionalized true story.

2014-12-23 (first published: )

17,000 reads

External Article

Using the MERGE Statement to Perform an UPSERT

The term UPSERT has been coined to refer to an operation that inserts rows into a table if they don’t exist, otherwise they are updated. To perform the UPSERT operation Microsoft introduced the MERGE statement. Not only does the MERGE statement support the UPSERT concept, but it also supports deleting records. Greg Larsen discusses how to use the MERGE statement to UPDATE, INSERT and DELETE records from a target table.

2014-12-22

13,060 reads

Blogs

The Book of Redgate: We Value Teams

By

This value is something that I still hear today: our best work is done...

Troubleshooting TempDB Log Full Errors When SSMS Won’t Connect

By

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

Artificial intelligence is no longer a distant concept. It is here, embedded in the...

Read the latest Blogs

Forums

Planning for tomorrow, today - database migrations

By John Martin

Comments posted to this topic are about the item Planning for tomorrow, today -...

Bottlenecks on SQL Server performance

By runarlan

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

By Rod at work

At work we've been getting better at writing what's known as GitHub Actions (workflows,...

Visit the forum

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