Tag: sql help

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TDE: A dive into encrypted data

by Andreas Kretschmer | 02.2024
How to check if TDE works? Some days ago a customer asked me how to check if TDE works and […]

ERROR: current transaction is aborted in PostgreSQL

by Hans-Jürgen Schönig | 10.2023
Whenever you actively use transaction blocks in PostgreSQL “ERROR: current transaction is aborted, commands ignored until end of transaction block” […]

Kill long running queries in PostgreSQL

by Hans-Jürgen Schönig | 10.2023
How to terminate long running queries in PostgreSQL: People might be fans of SQL, people might like PostgreSQL on Kubernetes […]

Citus: 7 commonly used advanced SQL tools

by Hans-Jürgen Schönig | 09.2023
When you run advanced SQL in Citus, what's possible? Which SQL statements work, and which ones don't? Citus is a […]

"hired" vs. "fired" - fuzzy search in PostgreSQL

by Hans-Jürgen Schönig | 09.2023
When dealing with data (and life in general) small things can have a major impact. The difference between “hired” and […]

Exclusion constraints in PostgreSQL and a tricky problem

by Christoph Berg | 09.2023
Exclusion constraints are a feature that is not very well known, but can be used to implement highly sophisticated constraints. […]

Conditional foreign keys and polymorphism in SQL: 4 Methods

by Laurenz Albe | 08.2023
  This article is about the notoriously difficult problem of “conditional foreign keys”. In object-oriented programming languages, polymorphism is a […]

Killing performance with PostgreSQL partitioning

by Hans-Jürgen Schönig | 07.2023
PostgreSQL is a powerful database which supports partitioning. In contrast to Oracle partitioning is part of the PostgreSQL core engine […]

Reproducible builds: a PostgreSQL query optimization example

by Christoph Berg | 07.2023
This post shows how to optimize a slow query that came out of the Reproducible Builds project. The Reproducible Builds […]

Subqueries and performance in PostgreSQL

by Laurenz Albe | 07.2023
  SQL allows you to use subqueries almost anywhere where you could have a table or column name. All you […]
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