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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.

Practical Examples of Data Normalization in PostgreSQL

by Michał Małecki | 01.2022
Data normalization - Learn how to apply the theory from part 1 of Michał Małecki's blog to real life with practical examples.

Data Normalization in PostgreSQL

by Michał Małecki | 01.2022
In his blog "Normalization by Osmosis", Michał Małecki gives you an overview of data normalization in PostgreSQL, including normal forms

Primary Keys vs. UNIQUE Constraints in PostgreSQL

by Hans-Jürgen Schönig | 11.2021
What primary keys and UNIQUE constraints do: Both features create an index, but what makes a primary key different from a unique constraint?

WITH HOLD cursors and transactions in PostgreSQL

by Laurenz Albe | 10.2021
  Both cursors and transactions are basic ingredients for developing a database application. This article describes how cursors and transactions […]

SHOW TABLES in PostgreSQL: what's wrong with it?

by Pavlo Golub | 10.2021
In this article, I will answer the questions: why isn't there a  SHOW TABLES command in PostgreSQL, when will SHOW […]

Gaps in sequences in PostgreSQL

by Laurenz Albe | 09.2021
  Most database tables have an artificial numeric primary key, and that number is usually generated automatically using a sequence. […]

PostgreSQL grouping sets: ROLLUP & CUBE

by Hans-Jürgen Schönig | 08.2021
PostgreSQL offers many OLAP-style workload features. One of those features is called “GROUPING SETS”. Let's deep dive into ROLLUP & CUBE:

PostgreSQL: LIMIT vs FETCH FIRST ROWS ... WITH TIES

by Hans-Jürgen Schönig | 07.2021
The LIMIT/OFFSET clause is off standard and thus not portable. Read about the proper way to handle it by using “SELECT … FETCH FIRST ROWS”.

Understanding LATERAL joins in PostgreSQL

by Hans-Jürgen Schönig | 07.2021
LATERAL joins are extremely useful & can be utilized in many cases to speed up operations, or to simply make code a lot easier to understand.

Creating and refreshing materialized views in PostgreSQL

by Hans-Jürgen Schönig | 06.2021
A “materialized view” is an integral feature of every advanced database system. How can you make use of materialized views in PostgreSQL?
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