Coding Standards Part 2 - Formatting
The second part of Steve Jones' series on coding standards within SQL Server.
Concatenating Rows
Often in database design we store different values in rows to take advantage of a normalized design. However many times we need to combine multiple rows of data into one row for a report of some sort. New author Carl P. Anderson brings us some interesting T-SQL code to accomplish this.
SLA Contracts
This Friday Steve Jones talks about the commitments and contracts that you may have with your customers. Do you know what they are? Is the contract explicitly spelled out? Take this Friday's poll and share your answer with everyone else.
Look-up Tables in SQL
Lookup tables can be a force for good in a relational database. Whereas the 'One True Lookup Table' remains a classic of bad database design, an auxiliary table that holds static data, and is used to lookup values, still has powerful magic. Joe Celko explains....
T-SQL Quiz 2011
The 2011 edition of MVP Jacob Sebastian's T-SQL Quiz is underway. You can take part in the quiz each day, submitting your answers for the chance to show off your knowledge and perhaps win some prizes.
Slow Fixes
Today we have an editorial reprinted from Jan 15, 2006 as Steve is on vacation. This one talks about the patching process at Microsoft, and why it sometimes is slower than we might like.
SQL and the JOIN Operator
How the JOIN operator works, the different types of JOINs and relevant information about joining tables.
Changes to the SSIS Slowly Changing Dimension Component
Probably not the kind of change you're expecting. I've recently been contacted by the Kimball Group, and they've asked me...
How To Use Regular Expressions for Data Validation and Cleanup
You need to provide data validation at the server level for complex strings like phone numbers, email addresses, etc. You may also need to do data cleanup / standardization before moving it from source to target. Although SQL Server provides a fair number of string functions, the code developed with these built-in functions can become complex and hard to maintain or reuse.
Controlling Growth of a Distribution Database
This article provides a practical example of minimizing the growth of a distribution database.
Blogs
Automatic Index Compaction
By ReviewMyDB
Index maintenance has always meant nightly jobs and a window you have to defend....
The Goldilocks problem – Materialized Views
I’m sure you’ve all heard the tale of Goldilocks and the Three Bears, but...
Monday Monitor Tips: Virtual Machine Usage and Cost
By Steve Jones
One of the things I’ve been requesting for a number of years is cost...
Forums
SQL Art, Part 4: Happy 4th of July — A British DBA's Guide to Celebrating a War We Don't Talk About
Comments posted to this topic are about the item SQL Art, Part 4: Happy...
How We Handled a Vendor Retry That Loaded Twice in Snowflake
Comments posted to this topic are about the item How We Handled a Vendor...
Cognitive Coverage
Comments posted to this topic are about the item Cognitive Coverage
Question of the Day
Getting the Average
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