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How to Implement Sort Indirection in SQL
I’ve recently stumbled upon this interesting Stack Overflow question, where the user essentially wanted to ensure that resulting records are delivered in a well-defined order. They wrote SELECT name...
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The Index You’ve Added is Useless. Why?
Recently, at the office: Bob: I’ve looked into that slow query you’ve told me about yesterday, Alice. I’ve added the indexes you wanted. Everything should be fine now Alice: Thanks Bob. I’ll quickly...
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SQL Server Trick: Circumvent Missing ORDER BY Clause
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...
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jOOQ Newsletter: May 21, 2014 – jOOQ Community Video Tutorials
Subscribe to this newsletter here Tweet of the Day Our customers, users, and followers are sharing their love for jOOQ with the world. Here are: Chris Martin who has switched jobs and is now really...
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Oracle Tip: v$sql Table or View does not Exist
If we want to analyse execution plans on the SQL console, we probably need to find a SQL_ID first, which we can the pass to the DBMS_XPLAN.DISPLAY_CURSOR function. One way to find this SQL_ID is by...
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Yet Another 10 Common Mistakes Java Developers Make When Writing SQL (You...
(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...
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QueryDSL vs. jOOQ. Feature Completeness vs. Now More Than Ever
This week, Timo Westkämper from QueryDSL has announced feature completeness on the QueryDSL user group, along with his call for contributions and increased focus on bugfixes and documentation. Timo and...
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Don’t Forget to Set the SEQUENCE CACHE Size
In most cases, simply creating an Oracle SEQUENCE with all defaults is good enough: CREATE SEQUENCE my_sequence; This sequence can then be used immediately in triggers when inserting new records in a...
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SQL Developer’s “Securely” Encrypted Passwords
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...
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Java 8 Friday: JavaScript goes SQL with Nashorn and jOOQ
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...
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Stop Trying to Emulate SQL OFFSET Pagination with Your In-House DB Framework!
I’m pretty sure you’ve gotten it wrong in numerous ways, so far. And you probably won’t get it right any time soon. So why waste your precious time on SQL tweaking, when you could be implementing...
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Java 8 Friday: 10 Subtle Mistakes When Using the Streams API
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...
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Conference Legal Disclaimers
After deep consideration with our lawyers, we would like to follow suit with Oracle and provide you with the following legal disclaimer about our jOOQ-related conference talks, as presented at the...
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jOOQ Newsletter: June 18, 2014 – jOOQ goes JavaOne™
jOOQ Goes JavaOne™ We’re super excited to announce that our CEO and Head of R&D Lukas will be heading to San Francisco this fall to talk about jOOQ at JavaOne™! This is not just great for Data...
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Should I Put That Table Alias or Not?
Infrequent SQL developers often get confused about when to put parentheses and/or aliases on derived tables. There has been this recent Reddit discussion about the subject, where user Elmhurstlol was...
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Stop Unit Testing Database Code
Writing tests that use an actual database is hard. Period. Now that this has been established, let’s have a look at a blog post by Marco Behler, in which he elaborates on various options when testing...
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PostgreSQL’s Table-Valued Functions
Table-valued functions are an awesome thing. Many databases support them in one way or another and so does PostgreSQL. In PostgreSQL, (almost) everything is a table. For instance, we can write: CREATE...
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Java 8 Friday: More Functional Relational Transformation
In the past, we’ve been providing you with a new article every Friday about what’s new in Java 8. It has been a very exciting blog series, but we would like to focus again more on our core content,...
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Logon Triggers: The Oracle Database Magic Bullet
Imagine you want to collect detailed usage statistics to tune your Oracle database, e.g. if you want to have A-Rows and A-Time values in your execution plans (by default, Oracle only reports E-Rows and...
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Frightening Facts about MySQL
So you might’ve seen Destroy all Software’s talk about JavaScript: Destroy all Software – WAT Here’s a similar talk (less funny more scary) about MySQL: Filed under: sql Tagged: Database, mysql,...
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