About Lukas Eder

Lukas is a Java and SQL enthusiast developer. He created the Data Geekery GmbH. He is the creator of jOOQ, a comprehensive SQL library for Java, and he is blogging mostly about these three topics: Java, SQL and jOOQ.

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Open Source Doesn’t Need More Support. It Needs Better Business Models

Jamie Allen, Typesafe‘s Director of Global Services published an interesting point of view on Twitter: Pivotal’s move to end support of Groovy is a stark reminder that enterprises ...
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Using Java 8 to Prevent Excessively Wide Logs

Some logs are there to be consumed by machines and kept forever. Other logs are there just to debug and to be consumed by humans. In the latter case, you often want to make sure that ...
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Suis-je Groovy? No! What Pivotal’s Decision Means for Open Source Software

Today there was great news in the JVM ecosystem. Pivotal, the company who is committed to OSS has become a bit less committed:The reaction in the community were largely summarised ...
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Infinite Loops. Or: Anything that Can Possibly Go Wrong, Does.

A wise man once said: Anything that can possibly go wrong, does – Murphy Some programmers are wise men, thus a wise programmer once said: A good programmer is someone who looks both ...
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Transform Your SQL Data into Charts Using jOOQ and JavaFX

In the recent past, we’ve shown how Java 8 and functional programming will bring a new perspective to Java developers when it comes to functional data transformation of SQL data using ...
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How to Emulate the MEDIAN() Aggregate Function Using Inverse Distribution Functions

Some databases are awesome enough to implement the MEDIAN() aggregate function. Remember that the MEDIAN() is sligthly different from (and often more useful than) the MEAN() or AVG() ...
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The Awesome PostgreSQL 9.4 / SQL:2003 FILTER Clause for Aggregate Functions

Sometimes when aggregating data with SQL, we’d love to add some additional filters. For instance, consider the following world bank data:                 GDP ...
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Leaky Abstractions, or How to Bind Oracle DATE Correctly with Hibernate

We’ve recently published an article about how to bind the Oracle DATE type correctly in SQL / JDBC, and jOOQ. This article got a bit of traction on reddit with an interesting remark ...
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Are You Binding Your Oracle DATEs Correctly? I Bet You Aren’t

Oracle database has its ways. In my SQL talks at conferences, I love to confuse people with the following Oracle facts:                  … ...
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A True SQL Gem You Didn’t Know Yet: The EVERY() Aggregate Function

We’ve just added support for the EVERY() aggregate function (#1391) to jOOQ, and would like to take the opportunity of letting you know of this true SQL gem that can come in handy ...
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