There are more exciting things in life than unit testing SQL Statements, checking the results, timings, and execution plans. Phil Factor demonstrates a PowerShell-based technique taking the tedium out of testing SQL DML.
Steve Jones reminds us that we must manage our time, and learn to do so despite the demands placed on us.
This SQL Prompt tip shows you how code highlighting makes it easier to find which items match up with each other.
Sandeep Mittal provides an introduction to the COALESCE function and shows how to use it.
What are the most popular SQL implementations for Hadoop? How different are they from T-SQL?
JP Morgan suffers the largest data breach for a financial institution, but Steve Jones doesn't think this record will stand for long.
Transparent Data Encryption offers the ability to encrypt content of the database, its transaction logs, as well as backups while at rest. Encryption and decryption are performed in real-time, at the individual page level, as the database is being written to and read from storage, without necessitating changes to applications accessing their data. Marcin Policht reviews the feature.
Before adopting Hadoop into your organisation there are a number of factors to consider. This article highlights some of the key points.
In SQL Server, heaps are rightly treated with suspicion. Although there are rare cases where they perform well, they are likely to be the cause of poor performance. If a table is likely to have a large number of changes, then it can become fragmented due to way that space is allocated and forward pointers used. How does one detect this problem? Is it significant? How does one deal with it, if necessary? Neeraj Tripathi explains.
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
Comments posted to this topic are about the item How We Handled a Vendor...
Comments posted to this topic are about the item Cognitive Coverage
I have this data in the dbo.Commission table in a SQL Server 2022 database.
salesperson commission Brian 12 Brian 16 Andy 7 Andy 14 Andy 21 Steve 20 Steve NULLAll the data is a varchar, and I decide to run this query to get the totals for each salesperson.
SELECT SalesPerson
, AVG(TRY_PARSE(Commission AS int)) AS TotalCommission
FROM commission
GROUP BY SalesPerson
GO
What average commission is calculated for Steve? See possible answers