Converting Data Across Time Zones: An In-Depth Primer
This article dives into all the math required to convert historical times between time zones.
2022-12-28
Uncategorized
2022-12-28
433 reads
The Lock Escalation Threshold – Part 3
The examples so far in this series have all used repeatable read isolation to acquire shared locks on qualifying rows and hold them to the end of the transaction. This was convenient for the demos but repeatable read isolation isn’t common in everyday use.
2022-12-26
Building a SQL Computational Framework for MACD Indicators
This article looks at how to calculate MACD indicators using a set of T-SQL code and data stored in a SQL Server database.
2022-12-26
2022-12-23
619 reads
Merry Christmas and Happy Holidays 2022
This weekend is Christmas, and likely many of you are not working hard today and will enjoy a long weekend until Tuesday. There are many other holidays at this time of year as well, and I hope you are enjoying the season with loved ones. I want to take a moment to wish everyone a […]
2022-12-23
66 reads
Heapq Module in Python: Using Heaps and Priority Queues
In this tutorial, learn about Python priority queues and heaps, how do they relate, and how to use the heapq module in Python.
2022-12-23
CPU Upgrades
Does your database server need an upgrade? Steve notes that you might learn a bit about the best hardware to ensure a good ROI. Even if you wouldn't make a change for your own desktop machine.
2022-12-21
151 reads
The Basics of Deleting Data from a SQL Server Table
n my last article “Updating SQL Server Data” I discussed using the UPDATE statement to change data in existing rows of a SQL Server table. In this article I will be demonstrating how to use the DELETE statement to remove rows from a SQL Server Table.
2022-12-21
2022-12-21
333 reads
Blogs
The Book of Redgate: Profits
By Steve Jones
Redgate is a for-profit company. We look to make money by building and selling...
Session Materials for Techorama & DataGrillen 2026
I’ve uploaded the slides for my Techorama session Microsoft Fabric for Dummies and my...
Stop Using Pandas for Aggregations — Try DuckDB Instead
If you've ever loaded a 2 GB CSV into pandas just to run a...
Forums
Even When You Know What You're Doing, You Can Screw Up
Comments posted to this topic are about the item Even When You Know What...
The New Software Team
Comments posted to this topic are about the item The New Software Team
Database Mail in SQL Server 2022
Comments posted to this topic are about the item Database Mail in SQL Server...
Question of the Day
The string_agg function
We create the following table and then insert some records in it:
create table t1 ( id int primary key, category char(1) not null, product varchar(50) ); insert into t1 values (1, 'A', 'Product 1'), (2, 'A', 'Product 2'), (3, 'A', 'Product 3'), (4, 'B', 'Product 4'), (5, 'B', 'Product 5');What happens if we execute the following query in both Sql Server and PostgreSQL?
select id,
category,
string_agg(product, ';')
over (partition by category order by id
rows between unbounded preceding and unbounded following) as stragg
from t1; See possible answers