How SQL Indexes work

Category: SQL :: Published at: 03.07.2022

In this article you will get the knowledge about very important function inside SQL databases.

We will talk about indexes.

Read more

How to add psql database and assign user

Category: SQL :: Published at: 27.05.2022

Here you can find quick tips, how to create a database in postgresql + you will also get the knowledge
about assigning user to the created database.

Read more

Conditional Statements in SQL - CASE, COALESCE, CAST

Category: SQL :: Published at: 31.12.2021

In this article you will get the knowledge about different conditional statements which are appearing in SQL language.

You will know how to execute SQL query only when some conditions are met.

Read more

How to use Self-Join in SQL

Category: SQL :: Published at: 31.12.2021

SQL beginners can have some problems with understanding how Self-Join works. But everybody should understand
how handy this query type is. It helps us to combine two records inside same table into single row.

This thing is widely used on some level of programming and for sure we all sure understand, how to use it.

Read more

How to use SubQuery in SQL

Category: SQL :: Published at: 31.12.2021

Sometimes you can realize, one query is not enough to get the information you want.
It just feels like you need to do it "in steps". Thank god, we have Subqueries in SQL.

Subqueries will help you make more complex SQL queries and i will show you how to write them.

Read more

OUTER JOINS tutorial - this is how to use it

Category: SQL :: Published at: 31.12.2021

In the previous article we were talking about INNER JOINS. Today we will try to understand OUTER JOINS with all their types.

If you want to understand how they work - this is place for you, just click Read more :)

Read more