Articles

External Article

Code Visibility: Browsing through Flyway Migration Files

If you can convert a SQL file to HTML, then you can inspect your Flyway migration files in a browser. This is especially useful if your SQL is color-coded with the same conventions as it was in your IDE. It is even better still if your browser can allow you to scan through many files, moving from file to file with a single click. This article will demonstrate how to do this with a few PowerShell scripts.

2024-01-24

External Article

Buy on-demand access for Summit 2023 today

Buy your on-demand ticket today to get access to hundreds of high-quality sessions across all 5 tracks at PASS Data Community Summit 2023. It’s a great way of learning at your leisure if you weren’t able to join us in person last year.

On-demand access is available for non-attendees to purchase for $1295. This will grant you access to all session recordings until November 17, 2024. Click here to buy.

2024-01-19

External Article

Kickstart the year with our free Livestream! Navigating the database landscape in 2024

The key finding from our annual ‘State Of’ survey is that there’s a need for skill diversification to keep up with the pace of technological advances in IT world.

How will this skills gap affect you?

Whether you’re just starting out in your career, you’re a seasoned data professional or you’re a senior IT leader wanting to stay ahead of business growth, join our free livestream on January 23rd.

Redgaters Steve Jones, Ryan Booz and Beca Parker will introduce key findings from the survey and offer their thoughts on the big changes coming in 2024 and what you can do to thrive in this changing landscape.

2024-01-17

External Article

Two-Dimensional Interval Packing Challenge

Packing intervals is a classic SQL task that involves packing groups of intersecting intervals to their respective continuous intervals. In mathematics, an interval is the subset of all values of a given type, e.g., integer numbers, between some low value and some high value.

2024-01-17

External Article

Eager Aggregation in SQL queries

Aggregation is a widely used way to summarize the content of a database. It is usually expressed with GROUP BY clause or just using aggregate functions (like COUNT or SUM). When the database engine executes a query with aggregations, it produces individual rows need to compute the required output and then performs the aggregation as (almost) last step. We discuss in this article how to re-write a query manually so that the order of operations will be different and when it can be beneficial.

2024-01-15

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Question of the Day

The LAGging NULL

I have this data in a SQL Server 2022 table:

player         yearid team HR
Alex Rodriguez 2012   NYY  18
Alex Rodriguez 2013   NYY  7
Alex Rodriguez 2014   NYY  NULL
Alex Rodriguez 2015   NYY  12
Alex Rodriguez 2016   NYY  9
If I run this code, what are the results returned in the hrgrowth column?
SELECT
  player
, yearid
, hr
, hr - LAG (hr, 1, 0) IGNORE NULLS OVER (ORDER BY yearid) AS hrgrowth
FROM dbo.playerstats;

See possible answers