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Full Name
Dani Schnider
Full Name
ACE Director
Top Level Details
Job Role
Principal Oracle & DWH Consultant
Company
Callista
Country
Switzerland
Top Expertise
Data Warehouse
Focus Area
Database
About Dani
Dani Schnider works as Principal Oracle & DWH Consultant for [Callista](https://callista.ch), a Swiss IT service provider for consulting and engineering. He has been working in database consulting for over 20 years, from 1999 to 2022 for Trivadis in Switzerland. Dani works with Oracle databases since 1994, since 1997 mainly in data warehouse projects. His tasks include DWH architecture reviews, data modeling, ETL development and performance optimization in Oracle databases. Dani is Oracle ACE Director and co-author of the books [Data Warehousing mit Oracle - Business Intelligence in der Praxis](http://www.amazon.de/Data-Warehousing-mit-Oracle-Intelligence/dp/3446425624) and [Data Warehouse Blueprints](https://www.amazon.de/dp/3446450750), both published in German by Hanser-Verlag. On his blog [Data Warehousing with Oracle](https://danischnider.wordpress.com) he writes about design and performance topics related to Oracle data warehouses. He is a [regular speaker](https://danischnider.wordpress.com/presentations/) at international Oracle user group conferences.
Expertises
Data Warehouse
SQL Performance
Database 23ai
Data Models
Oracle PL/SQL
Home Page
https://danischnider.wordpress.com
Oracle Community
https://community.oracle.com/tech/developers/profile/Dani%20Schnider
Links
Latest Contributions
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Learning from Mistakes: Meine grössten Fehler in Datenbankprojekten
Nov 18, 2025 - Presentation - in-person or virtual - DOAG Conference 2025
Database
Application Development
Data Models
Architecture
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Data Engineering mit Open Source Produkten – ein Erfahrungsbericht
Nov 18, 2025 - Presentation - in-person or virtual - DOAG Conference 2025
Data Warehouse
Data Models
Autonomous Database
Extract, Transform and Load (ETL)
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QUALIFY: The WHERE Condition for Analytic Functions
Oct 24, 2025 - Blog post -
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Learning from Mistakes: Meine grössten Fehler in Datenbankprojekten
Oct 23, 2025 - Presentation - in-person or virtual - SOUG Day Zurich
Database
Application Development
Data Models
Architecture
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Book Review: “Data Engine Thinking” by Roelant Vos and Dirk Lerner
Aug 22, 2025 - Blog post -
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Oracle 23.9 supports GROUP BY ALL
Aug 05, 2025 - Blog post -
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