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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 (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, FlowHigh,

Improving performance and reducing costs with Materialised Views on Snowflake

What are Materialised Views? Materialised Views are similar to Views. A View is a logical or virtual table representing the result of a query. Each time the View is queried…
Uli Bethke November 18, 2022
XML, XML,

Converting Duck Creek XML to a relational database

Duck Creek makes extensive use of XML. All Policy data is locked away in XML just to give one example. XML is a great format for exchanging data and for…
Maciek October 18, 2022
Snowflake, FlowHigh,

How to do full text search with Snowflake, Inverted Indexes and Snowpark

Inverted Index An Inverted Index is a data structure used to support full text search over a set of documents. An inverted index is very similar to an index at…
Uli Bethke September 19, 2022
SQL, FlowHigh,

SQL antipatterns:  SELECT DISTINCT

The DISTINCT operator The DISTINCT operator is used to eliminate duplicates in a resultset, e.g. we can use it to identify the unique number of customers who made a purchase.…
Uli Bethke August 9, 2022
Snowflake, Snowflake,

Best Practices for implementing a Data Lake on Snowflake

Data lakes. An introduction Data lakes are a common and useful design pattern in modern data architecture. Contrary to a widespread belief, data lakes have been around for a long…
Uli Bethke April 20, 2022
Snowflake, Snowflake,

Date Dimension with Global Holiday Calendar

Overview A date dimension is an essential table in a data model that allows to analyze performance more effectively across different time periods. It should be included in every dimensional…
Uli Bethke March 21, 2022