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Improving SQL Server Performance and Availability with Accelerated Database Recovery

For many businesses, database performance and availability are crucial elements. A database crash or a lengthy transaction can cause a lot of downtime and have a negative effect on business operations. However, with the introduction of Accelerated Database Recovery (ADR), Microsoft SQL Server has added a potent new feature that greatly enhances database availability and […]

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Working with Flyway And Entity Framework Code First: An Overview

This article presents an approach to database development and deployment that combines the strengths of Entry Framework Code First for .NET-driven development with the control and database versioning provided by Flyway's SQL migrations. It allows every database change to be reviewed and tested for integrity, performance, and stability in the same way as any application change. It should make a Database CI process much easier to sustain.

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How to Automate Cross-Platform Database Development

In order to focus on their primary task of developing databases, the development team need to automate as many as possible of the routine tasks that are essential for database delivery, such as testing, scripting, version control, documentation, code review, reporting and so on. This article gives some advice on how to do it, faced with the added challenge of needing to use several different relational databases.

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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