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Tag: sql help

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

usql: universal psql?

by Pavlo Golub | 01.2023
usql? But why? usql is a universal command-line interface for many database. But why are we still using CLI (command […]

Improving GROUP BY with CREATE STATISTICS

by Hans-Jürgen Schönig | 01.2023
Analyzing time series often comes with challenges. This is especially true if you want to do a bit more than […]

hex, oct, bin integers in PostgreSQL 16

by Pavlo Golub | 12.2022
SQL and integer notations NEW in PostgreSQL 16 - support for non-decimal notation of integer constants! PostgreSQL already has powerful […]

Faceting large result sets in PostgreSQL

by Ants Aasma | 12.2022
While the term faceting may sound foreign to you, you almost certainly have run into it in your adventures online. […]

GRANT VACUUM, ANALYZE in PostgreSQL 16

by Pavlo Golub | 11.2022
What is GRANT VACUUM, ANALYZE? PostgreSQL uses table VACUUM and ANALYZE commands to optimize the database. The VACUUM command reclaims […]

LISTEN / NOTIFY: Automatic client notification in PostgreSQL

by Hans-Jürgen Schönig | 09.2022
What is LISTEN and NOTIFY? LISTEN / NOTIFY is a feature that enables users to listen to what goes on […]

PostgreSQL: Sequences vs. Invoice numbers

by Hans-Jürgen Schönig | 09.2022
Sequences are a core feature of SQL. However, some users are tempted to implement sequences to generate invoices. That's dangerous […]

What is an inner join in SQL? And what is an outer join?

by Hans-Jürgen Schönig | 09.2022
A join is a concept in IT which is widely used and often referred to but rarely really understood. What […]

ERROR: nextval: reached maximum value of sequence

by Hans-Jürgen Schönig | 09.2022
serial is a popular pseudo data type in PostgreSQL which is often used to generate auto-increment columns. However, this can […]

ALTER TABLE ... ADD COLUMN … done right in PostgreSQL

by Hans-Jürgen Schönig | 08.2022
Running ALTER TABLE … ADD COLUMN can have side effects which have the potential to cause serious issues in production. […]
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