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Data Lineage,

SQL Visualisation Guide – Query Diagrams, Lineage & ERD

Have you ever inherited the SQL codebase from someone else where it is in a “bit of a mess”? 😁 Sound familiar? Most data engineers and SQL developers have been there including myself—staring at a spaghetti-like web of queries, trying to untangle a chaotic SQL codebase. It’s a common nightmare. Traditionally, you had to fight …
Uli Bethke November 3, 2024
SQL,

SQL Challenge: Tackling the Island Problem in Time Series Data

Jump into our SQL Challenge! Today, we're exploring customer loyalty trends. Are you prepared to show off your SQL skills? About the quiz In this SQL pop quiz, we're challenging…
Uli Bethke November 7, 2023
XML,

XML Converters & Conversion – Ultimate Guide (2024)

“Urgent XML Conversion Project – Need by End of Week”. “Just Convert this XML to SQL Tables. Should be Simple!” Sound familiar?  From my experience, XML conversion projects follow the…
Maciek October 4, 2023
Snowflake,

7 guardrails against common mistakes that inflate Snowflake credit usage 

Dodge costly pitfalls Snowflake implementation has pioneered dozens of innovations in the data platform space. The long list includes separation of compute and storage, physical workload separation, data sharing, data…
Uli Bethke September 13, 2023
SQL,

Automatically detect bad SQL. Static and dynamic analysis of SQL code

Preventing Query Catastrophe with FlowHigh SQL Analyser Does the following sound familiar? As the wizard EsQuEl delved deep into the SQL code, he stumbled upon multiple instances where tables were…
Uli Bethke September 8, 2023

Recent Articles

All JSON Snowflake XML
SQL,

Bad SQL. SQL anti patterns in OUTER joins

You often need to find both matched and unmatched rows between two or more tables. As we all know we use OUTER joins in SQL to achieve this. However, there…
Uli Bethke August 29, 2023
Snowflake,

Country & City Dimension

Country The COUNTRY table serves as a comprehensive repository, capturing essential attributes and details about countries globally. It encompasses unique identifiers, standardized codes, geographical data, and practical information. COUNTRY_CD: Description:…
Uli Bethke August 18, 2023
Snowflake,

How Snowflake EXCLUDE and ILIKE protects you from bad SQL. ILIKE it like that.

One of the most common and impactful SQL anti patterns is the use of SELECT *. In this article we will explain what an SQL anti pattern is and how…
Uli Bethke August 16, 2023
Snowflake, Data Marketplace,

Netherlands Open Map Data

Netherlands administrative boundaries and road network The data is organised across two themes. Administrative: This data set contains the polygons for Netherlands administrative boundaries at different levels. It includes the…
Uli Bethke May 18, 2023
Snowflake, Data Marketplace,

Planet Earth Open Map Data

The data is based on OpenStreetMap and enriched with third party sources. It is organised across eleven themes. Each theme is organised by classes and subclasses. You can drill down…
Uli Bethke May 15, 2023
Snowflake, Data Marketplace,

UK Open Map Data

UK administrative boundaries and road network The data is organised across two themes. Administrative: This data set contains the polygons for UK administrative boundaries at different levels. It includes the…
Uli Bethke May 8, 2023