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Category: How To

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Here you can find all blog posts about the Category: How To. You can go back to all blog posts or take a look into our other categories & tags.

Debugging PL/pgSQL: GET STACKED DIAGNOSTICS

by Hans-Jürgen Schönig | 09.2020
GET STACKED DIAGNOSTICS makes debugging PL/pgSQL code a lot easier. This post will show what it does and how you can make use of it.

Generating a normal distribution in SQL

by Hans-Jürgen Schönig | 09.2020
SQL and PostgreSQL can be used to create sample data which possesses certain statistical properties like a normal distribution.

PostgreSQL vs PostgreSQL vs Postgres vs Oracle vs all the rest

by Hans-Jürgen Schönig | 09.2020
How can you find data even if there are typos? In PostgreSQL there are various solutions to the problem of a search with odd spelling.

PostgreSQL: GROUP BY expression

by Hans-Jürgen Schönig | 08.2020
GROUP BY is an integral part of SQL and PostgreSQL. You might not know that the GROUP BY expression can handle more than just simple fields.

Understanding recursive queries in PostgreSQL

by Laurenz Albe | 08.2020
  Many people consider recursive queries a difficult topic. Still, they enable you to do things that would otherwise be […]

effective_cache_size: A practical example

by Hans-Jürgen Schönig | 07.2020
Few people know what effective_cache_size really does in PostgreSQL. Let me share some more insights and a practical example.

PostgreSQL: Useful new data types - CREATE DOMAIN

by Hans-Jürgen Schönig | 07.2020
UPDATED 08.05.2023 How to create useful new data types with CREATE DOMAIN in PostgreSQL | Advanced server side check constraints

Calculating differences between rows in SQL

by Hans-Jürgen Schönig | 06.2020
Calculating differences between rows | How can one calculate the difference between the current and the previous row? | timeseries data

PostgreSQL: ltree vs. WITH RECURSIVE

by Hans-Jürgen Schönig | 06.2020
WITH RECURSIVE in PostgreSQL is efficient. However, ltree does have its strengths as well. Let us take a closer look. | Improve performance

SQL trickery: Hypothetical aggregates

by Hans-Jürgen Schönig | 06.2020
“If we had this data what would it mean?” - read more about this PostgreSQL technique, what it is good for & how it works.
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