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
SQL,

Tricks with SQL: Beware of the Predicate in the Outer Join

Today we will have a look what happens when we place a filter condition into an outer join. We will also have a look at how this compares to placing…
Uli Bethke November 21, 2012
Oracle Data Integrator (ODI),

Making use of ODI Flexfields to meet requirements

Get our e-books Discover the Oracle Data Integrator 11g Repository Data Model and Oracle Data Integrator Snippets and Recipes What are ODI Flexfields? In ODI you can create user-defined fields…
Uli Bethke November 12, 2012
Oracle Data Integrator (ODI),

ODI Snippets: What is the Optimization Context in ODI?

Get our e-books Discover the Oracle Data Integrator 11g Repository Data Model and Oracle Data Integrator Snippets and Recipes There are a lot of confusing messages out there on what…
Uli Bethke October 30, 2012
Oracle Data Integrator (ODI),

How to query a whole schema or even database?! This tip will save you hours and hours of boring work.

Get our e-books Discover the Oracle Data Integrator 11g Repository Data Model and Oracle Data Integrator Snippets and Recipes I really like this tip especially its simplicity. It has saved…
Uli Bethke October 22, 2012
SQL,

Uses of the modulo operator: How Oracle mod can make your life easier.

You may ask, what the heck is modulo? Well, below is an easy to understand definition. "Modulo basically means keep taking the second number away from the first number. When…
Uli Bethke October 11, 2012
Oracle Data Integrator (ODI),

Best practice of organizing interfaces and data stores into projects and models in ODI

Get our e-books Discover the Oracle Data Integrator 11g Repository Data Model and Oracle Data Integrator Snippets and Recipes Have you ever wondered what the best way is to structure…
Uli Bethke October 3, 2012