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SQL do Zero ao Herói
4.7+
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★★★★★
2427 avaliações
Beginner
Hoje vamos aprender como gerenciar grandes conjuntos de dados e analisar dados reais.
SQL
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Try Codefinity TeamsWhat you will learn
- You will learn how to write basic SQL queries to retrieve data from databases
- You will understand how to filter, sort, aggregate and join data using SQL
- You will learn how to modify and manage database structures with Data Definition Language (DDL)
- You will develop skills to manage and manipulate data using Data Manipulation Language (DML)
- You will gain a deep understanding of relational database concepts and the principles of normalization
- You will learn how to optimize your queries using indexing and understand the importance of database performance
- You will explore advanced SQL techniques such as triggers and window functions to enhance your data processing capabilities
- You will understand and apply the principles of ACID in SQL transactions
- You will learn how to create and manage database views and use them effectively in data retrieval
- 101 chapters
- 12 hours
- 112 tasks
Trusted by employees of leading companies
Learning track content
Module 1 / Introdução ao SQL
Nesta seção, aprenderemos como usar a instrução SQL SELECT para obter uma única coluna de tabela, múltiplas colunas de tabela e todas as colunas de tabela. Também descobriremos como retornar valores únicos.
- Recuperando Colunas IndividuaisPreview
- Recuperando Múltiplas ColunasPreview
- Recuperando Todas as ColunasPreview
- Recuperando Linhas DistintasPreview
- Limitando ResultadosPreview
- Desafio: Encontre a População dos PaísesPreview
- Desafio: Encontre Todos os PaísesPreview
- Desafio: Encontre Todos os Países Com Seus IDsPreview
- Desafio: Encontre as Capitais dos PaísesPreview
- Desafio: Encontre as Regiões em que Todos os Países Estão LocalizadosPreview
Nesta seção, aprenderemos como classificar dados recuperados usando a cláusula ORDER BY. Esta cláusula, que deve ser a última na instrução SELECT, pode ser usada para classificar dados em uma ou mais colunas conforme necessário.\n
- Classificando DadosPreview
- Desafio: Ordenação de PopulaçãoPreview
- Ordenação por Múltiplas ColunasPreview
- Desafio: Consulta de Dupla OrdenaçãoPreview
- Especificando a Direção da OrdenaçãoPreview
- Desafio: Ordenar os Países por Região e CapitalPreview
- Desafio: Ordenar Capitais em Ordem DecrescentePreview
- Desafio: Ordenar Países em Ordem CrescentePreview
- Desafio: Encontre Países, Seus IDs e Suas PopulaçõesPreview
- Desafio: Encontre Países, IDs, Populações, Regiões e Classifique-osPreview
- Desafio: Encontre Todos os Continentes e Ordene-os em Ordem CrescentePreview
Nesta seção, aprenderemos como filtrar dados retornados usando a cláusula WHERE da instrução SELECT. Aprenderemos a testar igualdade, desigualdade, valores maiores e menores que intervalos de valores, e valores NULL.
Nesta seção, aprenderemos como combinar cláusulas WHERE com os operadores AND e OR. Também descobriremos como o operador NOT funciona.\n\n\n
Nesta seção, aprenderemos o que são as funções de agregação SQL e como usá-las para resumir dados de tabelas.
Module 2 / SQL Intermediário
Nesta seção, você vai aprender como agrupar e trabalhar com esses dados. Para isso, vamos nos familiarizar com o operador GROUP BY. Você também aprenderá a filtrar dados agrupados utilizando o operador HAVING.
Nesta seção, você vai aprender o que são subconsultas aninhadas, como criá-las e como trabalhar com elas.
Nesta seção, você aprenderá como pode combinar várias tabelas, trabalhando assim com uma tabela comum, o que simplificará a criação de consultas.
Aprenda os fundamentos da Linguagem de Definição de Dados (DDL) e da Linguagem de Manipulação de Dados (DML) em SQL, incluindo como criar, modificar e deletar objetos de banco de dados, bem como inserir, atualizar e deletar dados dentro das tabelas.
Module 3 / Relational Database and Normalization
This section dives into the world of relational and non-relational databases, teaching you how to visually represent database structures.
We'll dive deep into relational databases, giving you a thorough understanding of essential concepts. This includes topics like foreign keys, various ON DELETE options, and the different types of relationships.
Ready to build a database? This section will hone your skills, emphasizing the importance of a well-structured database for peak performance. Here, you'll grasp the fundamental principles of crafting user-friendly databases.
Module 4 / Advanced Techniques in SQL
Now we explore the basic principles of ACID (Atomicity, Consistency, Isolation, Durability) in database management. Learn how these principles ensure reliable transactions by guaranteeing complete operations, keeping data consistent, isolating concurrent transactions, and ensuring permanent data storage.
Explore how to enhance the efficiency of your SQL queries through index optimization. Delve into the significance of indexes in database performance, learning how to design, implement, and utilize them effectively. Discover strategies for choosing the appropriate indexes, understanding their impact on query execution plans, and optimizing query performance through index selection and utilization.
This section explores pivotal topics such as Triggers, Window Functions, and DCL (Data Control Language), offering comprehensive insights into their implementation and optimization strategies. Furthermore, it navigates the landscape of NoSQL DBMS, providing a thorough understanding of its architecture, advantages, and practical applications.
Requirements
- A computer with a browser - all browsers are supported.
- Your enthusiasm to enhance your tech skills.
- Everything else needed to start learning and practicing is already included in this course.
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_Gracy
it's simply perfectly well explained
it's simply perfectly well explained! so far I have not experienced any difficulty because everything is so well managed...
Ruslan Kravchuk
The main thing is to learn and not give up
The material is good, there is a lot to learn, all in order to become better and the main thing is to learn what you want....
Matteo Comune
Thanks to them I'm learning a lot…
Thanks to them I'm learning a lot faster because they help you to understand everything from scratch. It's the best website that helps people with no background in IT...
Yuliana Cadavid
great course for beginners
great course for beginners, they test your knowledge in every lesson...
Elpunzon
I am enjoying my Codefinity experience…
I am enjoying my Codefinity experience learning Python. The self-paced way of learning is great because I can fit it into my schedule...
Alexandru Alexandru
Is nice to learn from codefinity
Is nice to learn from codefinity. Its easy and have good examples on what I learned here...
jacob Templet
Easy to follow along with and provides…
Easy to follow along with and provides challenge in my every day life. The challenge keeps me wanting to learn day after day...
Elan
Codefinity is a comprehensive learning…
Codefinity is a comprehensive learning tool to help you develop your skills as a software engineer or data scientist. The exercises are fun and a good way to sharpen your skills...
Thibault
First time learning how to code
First time learning how to code and successfully doing so with codefinity - thank you...
Adrien Morel
Well designed for total beginners
Well designed for total beginners, incremental progress and makes me feel confident....
_Gracy
it's simply perfectly well explained
it's simply perfectly well explained! so far I have not experienced any difficulty because everything is so well managed...
Data Engineer
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Boost your Tech Skills!
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- Personalized study tracks
- Certificates of completion
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