Home » Author Archives: Lukas Eder (page 8)

Author Archives: 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.

Java 8 Friday: 10 Subtle Mistakes When Using the Streams API

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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Java 8 Friday: JavaScript goes SQL with Nashorn and jOOQ

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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SQL Developer’s “Securely” Encrypted Passwords

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Recently, while at one of our customers’ site, the customer and I needed to get access to a database. On my machine, I had stored the password, but the customer obviously didn’t want to rely on my machine, and the password itself is hashed, so we couldn’t guess it. But guess what? Yes we can! I googled a bit, and ...

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Java 8 Friday: Most Internal DSLs are Outdated

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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Yet Another 10 Common Mistakes Java Developers Make When Writing SQL (You Won’t BELIEVE the Last One)

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(Sorry for that click-bait heading. Couldn’t resist!) We’re on a mission. To teach you SQL. But mostly, we want to teach you how to appreciate SQL. You’ll love it! Getting SQL right or wrong shouldn’t be about that You’re-Doing-It-Wrong™ attitude that can be encountered often when evangelists promote their object of evangelism. Getting SQL right should be about the fun ...

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Java 8 Friday: Better Exceptions

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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Free as in Beer has caused Heartbleed (and Much More)

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Heartbleed is a bit over one month old now. A bug significant enough to have its own Wikipedia page. Today, we’re going to look into how wrong we have been in assuming that Open Source software is more secure than commercial software, because of our thinking that source code is open and that many developers are looking into it.   ...

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Java 8 Friday: API Designers, be Careful

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At Data Geekery, we love Java. And as we’re really into jOOQ’s fluent API and query DSL, we’re absolutely thrilled about what Java 8 will bring to our ecosystem. Java 8 Friday Every Friday, we’re showing you a couple of nice new tutorial-style Java 8 features, which take advantage of lambda expressions, extension methods, and other great stuff. You’ll find ...

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SQL Server Trick: Circumvent Missing ORDER BY Clause

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SQL Server is known to have a very strict interpretation of the SQL standard. For instance, the following expressions or statements are not possible in SQL Server:                   -- Get arbitrarily numbered row_numbers SELECT ROW_NUMBER() OVER () -- Skip arbitrary rows SELECT a FROM (VALUES (1), (2), (3), (4)) t(a) OFFSET 3 ...

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