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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.

Monitoring: Keeping an eye on old transactions

by Hans-Jürgen Schönig | 09.2013
To handle transactions PostgreSQL uses a mechanism called MVCC (Multi Version Concurrency Control). The core idea of this machinery is […]

PostgreSQL Vim integration: Finally ...

by Hans-Jürgen Schönig | 09.2013
In one my last blogs I came up with the idea of writing some Vim script for PostgreSQL so that […]

From PostgreSQL directly to Vim

by Hans-Jürgen Schönig | 09.2013
Some (obvious) ideas can struck you when you are just sitting around at the airport or so. This is exactly […]

Speeding up “min” and “max”

by Hans-Jürgen Schönig | 09.2013
Indexes are a perfect tool to find a certain value or some kind of range in a table. It is […]

Reporting: Creating correct output

by Hans-Jürgen Schönig | 08.2013
Creating reports is a core task of every PostgreSQL database engineer or developer. However, many people think that it is […]

Table bloat revisited: Making tables shrink in PostgreSQL

by Hans-Jürgen Schönig | 08.2013
UPDATED August 2023 - Table bloat in PostgreSQL: Many people wonder why deleting data from a table in a PostgreSQL […]

Detecting table bloat in PostgreSQL

by Hans-Jürgen Schönig | 08.2013
If your PostgreSQL database is purely maintained (lack of VACUUM) or badly structured, you might face some table bloat. UPDATE […]

Common mistakes: UNION vs. UNION ALL

by Hans-Jürgen Schönig | 08.2013
In my role as a PostgreSQL consultant and trainer there are a couple of issues, which pop up on a […]

Reducing the number of columns with bit

by Hans-Jürgen Schönig | 08.2013
After digging through a table consisting of dozens of boolean values I thought it might be helpful to more folks […]

Time in PostgreSQL: Outer joins

by Hans-Jürgen Schönig | 08.2013
UPDATED AUGUST 2023: After my previous post, I received mails asking about what was meant by using “generate_series” in an […]
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