Top Articles

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 (2025)

“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,

Detect Bad SQL with Static & Dynamic Code Analysis – A Guide

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
Snowflake,

Data Warehouse 3.0. A Reference Architecture for the Modern Data Warehouse.

Reference data architecture for data management and analytics. An introduction. I frequently come across data architecture diagrams that are riddled with vendor names, tools, and technologies. Tools and technologies have…
Uli Bethke December 9, 2021
SQL Parser, FlowHigh,

SQL Parser deep dive. Use cases, features, practical examples, and tools for SQL parsing

In this blog post we will cover all aspects of SQL parsing. First we will explain what we mean by SQL parsing and look at the inner workings and mechanics…
Uli Bethke October 22, 2021
XML, flexter, JSON, XML,

Converting XML and JSON to a Data Lake

Data lakes are a popular design pattern in data analytics. A data lake is used to store a copy of data coming from operational source systems such as relational databases.…
Maciek September 30, 2021
XML, XML,

Ultimate Guide to Parsing XML to Google BigQuery (2025)

While XML is frequently considered a legacy file format it is still widely used as part of industry data standards such as HL7 or ACORD. Another use case is for…
Maciek June 22, 2021
JSON, JSON, Snowflake,

Snowflake vs. Redshift – Support for Handling JSON

ANSI SQL 2016 introduced support for querying JSON data directly from SQL. This is a common use case nowadays. JSON is everywhere in web based applications, IOT, NoSQL databases, and…
Uli Bethke June 22, 2021
Data Warehouse, Snowflake,

Using Virtual Data Marts the right way

Virtual data marts can be a useful design pattern but there are a few things you should know before you use them. Virtual data marts are logical views dimensionally modelled…
Uli Bethke May 26, 2021