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 (2026)

“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
Oracle Data Integrator (ODI),

ODI Snippets: Oracle Data Integrator, Excel data types, and limitations of the MS Excel ODBC driver.

Get our e-books Discover the Oracle Data Integrator 11g Repository Data Model and Oracle Data Integrator Snippets and Recipes I have come across two serious issues when loading data from…
Uli Bethke October 10, 2009
Oracle Data Integrator (ODI),

ODI Snippets: Installing multiple ODI agents on one server

Get our e-books Discover the Oracle Data Integrator 11g Repository Data Model and Oracle Data Integrator Snippets and Recipes Sometimes it may come in handy to have multiple agents running…
Uli Bethke October 7, 2009
Oracle Data Integrator (ODI),

Executing Interfaces and Procedures in parallel in a Package with ODI

Get our e-books Discover the Oracle Data Integrator 11g Repository Data Model and Oracle Data Integrator Snippets and RecipesI have been working on Oracle Data Integrator (ODI) over the last…
Uli Bethke April 29, 2009
Oracle Data Integrator (ODI),

Query hints in OBIEE

I have recently come across a post on the OTN forums on how to use hints in OBIEE. OBIEE lets you specify hints in the physical layer on a table…
Uli Bethke April 5, 2009
SQL,

Date dimension script with Oracle SQL

The script below will create a date dimension in just one SQL statement. We don't use performance-killer nonsense such as cursors, functions etc. We just pick a start date and…
Uli Bethke February 24, 2009
SQL,

One pass SCD2 load: How to load a Slowly Changing Dimension Type 2 with one SQL Merge statement in Oracle

The other day I came across a useful new feature in the Merge statement for SQL Server 2008. This new feature outputs merged rows for further processing, something which up…
Uli Bethke February 1, 2009