How I Used PostgreSQL RLS To Avoid Code Changes During a Migration
This article discusses how one person implemented Row Level Security in PostgreSQL to help with a data migration from a single tenant to a multi-tenant database structure.
Query Exercise: Beat ChatGPT at Finding Good Question Times
What are the best days of the week and times of the day to post a question at StackOverflow.com?
SQL Injection Is Not Acceptable
An alert from the US government says that SQL Injection isn't an acceptable problem.
SQL Server TRY CATCH, RAISERROR and THROW for Error Handling
Learn about SQL Server error handling using TRY CATCH, RAISERROR, and THROW for stored procedures, triggers, and user-defined functions.
The CHECK() Constraint
One of the many ways a relational table differs from the file structures used by pre-relational storage systems is that the tables, rows and columns can have constraints on them. This allows you to reduce the types of bad data that can be loaded into your tables.
Baseball Everywhere
Last week was supposed to be my turn to curate Database Weekly and write an editorial to go along with it. Graciously, Mr. Louis Davidson (@drsql) offered to switch weeks while I was in Cambridge, England with most of the Redgate Marketing team for our yearly global gathering at HQ. As a remote worker on […]
Fine-grained Access Control for Stored Procedures
Fine-grained access control for stored procedures using a programmable database proxy
Blogs
Free webinar – Tackling the Gaps and Islands Problem with T-SQL Window Functions
I’m hosting a free webinar at MSSQLTips.com at the 19th of December 2024, 6PM...
Counting Groups with Window Functions: #SQLNewBlogger
By Steve Jones
I looked at row_number() in a previous post. Now I want to build on...
The query processor ran out of internal resources and could not produce a query plan – When You’ve Managed to Confuse SQL With a Crazy IN Clause.
Recently I received a cry for help over Teams. The issue was that an...
Forums
How to determine if a DB is currently being used
Hi - I'm looking for advice regarding the best & quickest way to establish...
Data cleansing/conversion tool HPE
Hello. I am looking for a tool Data cleansing/conversion, was recommended HPE any...
System views in a contained availability group
I have a query that runs in a job to check on orphaned users....
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 9If 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