Tech Lunch News
Predminulý týden (10. listopadu 2021) jsme porádali už nekolikátý verejný Tech Lunch. Jde o pulhodinový call, na kterém pravidelne prezentujeme novinky ze sveta dat (datové sklady, Azure, SQL Server,...
2021-11-23
5 reads
Power BI – Hungry Median – Aggregations
Introduction In my last blog post, I have addressed an issue with DAX Median function consuming a lot of memory. To refresh the result, below is the performance summary...
2020-12-10 (first published: 2020-12-01)
217 reads
Power BI – Hungry Median
Introduction Median is a useful statistical function, which first time appeared in SSAS 2016 and in Power BI around that year as well. There are several articles on how...
2020-12-08 (first published: 2020-11-24)
319 reads
SSAS Tabular – Process Add vs Partition Merge
Time keeps on running and as I promised in my last article I would like to compare the Process ADD vs Partition Merge technique. In the previous blog I...
2020-06-11 (first published: 2020-05-25)
409 reads
Azure Analysis Services – Processing Hot & Cold Data using Tabular model partitions
Introduction Recently have been working on a “Proof of Concept” task where I wanted to test the capabilities of Azure Analysis Services Tabular model when loading data from different...
2020-04-07 (first published: 2020-03-30)
898 reads
SSAS Tabular – Process Add memory consumption
For me it’s a bit surprising how little information can be found regarding the “Process Add” option which I consider as the best choice for incremental data load to...
2020-01-23
51 reads
Query Performance Tuning with Filtered Statistics
Introduction I recently got a call from our DBA telling me that the CPU usage is hitting 100% on the DB server and the ETL process runs for more...
2019-09-04 (first published: 2019-08-26)
677 reads
How to get Live Execution Plan using Extended Events
Introduction
Have you ever found yourself in a situation where you were supposed to troubleshoot a long running expensive query that...
2019-03-06 (first published: 2019-02-19)
6,152 reads
Extended Events: Detect Implicit Conversions that affect execution plans
Implicit Conversions – Introduction
In this blog post, I’ll explain and demonstrate how to use Extended Events to detect Implicit Conversions that...
2019-01-24 (first published: 2019-01-15)
2,748 reads
Clustered Column Store Load Pitfalls – Magic number 64 when using WHERE IN clause
The Problem
During our workload we have recognized a difference in performance for queries using IN clause. We are building query...
2018-12-18
162 reads
Blogs
SQL Saturday Boston 2024 Slides
By Steve Jones
Thanks to everyone that came to my talks. Slides are below. Best Practices for...
Small Data SF 2024
By Steve Jones
I can’t remember how I heard about Small Data SF 2024, but it caught...
A New Word: Moledro
By Steve Jones
moledro – n. a feeling of resonant connection with an author or artist you’ll...
Forums
Impact of adding the opening of the Master Key in a SQL job for SSIS packages
Bonjour à tous, J'ai un problème d'exécution de mes packages SSIS. A chaque opération...
Being an extroverted introvert at a conference
Comments posted to this topic are about the item Being an extroverted introvert at...
Need to group the same valued ID fields to run an aggregate average over them
I have data that contains poll results, with the poll_id consistuting a single row...
Question of the Day
How are statistics stored?
How are the statistics for query optimization stored in SQL Server?
See possible answers