Agrégation de Données avec des Requêtes SQL from Coursera

L'agrégation nous permet de combiner les résultats en regroupant les enregistrements en fonction de la valeur. Il est également utile pour calculer des valeurs combinées dans des groupes. Cela se fait à l'aide de fonctions d'agrégation: "min", "max", "sum", "count" et "avg" en plus de l'opération de jointure.

Étant programmeurs de bases de données débutants, vous serez capables d'utiliser les requêtes agrégées afin de regrouper les valeurs de plusieurs lignes de données selon certains critères pour former une valeur unique plus significative.

A travers ce projet, nous allons renforcer ces notions en manipulant la base de données de l'âge d'or de la musique française. Nous allons explorer les infos des artistes, chansons et albums les plus populaires dans cette période afin d'en extraire des aperçus pertinents, tout en utilisant SQL.

La compréhension de l'agrégation de données vous aidera à progresser dans une entreprise étant donné que les bases de données sont nécessaires pour toute organisation puisqu'elles servent à communiquer les informations facilement et efficacement.

What's inside

Syllabus

Présentation du projet

À la fin de ce projet, vous serez capables d’appliquer les requêtes agrégées SQL. Une requête agrégée est une méthode de dérivation des données de groupe et de sous-groupe par l'analyse d'un ensemble d'entrées de données individuelles. L'agrégation nous permet de combiner les résultats en regroupant les enregistrements en fonction de la valeur. Il est également utile pour calculer des valeurs combinées dans des groupes. Cela se fait à l'aide de fonctions d'agrégation: "min", "max", "sum", "count" et "avg" en plus de l'opération de jointure. Étant programmeurs de bases de données débutants, vous serez capables d'utiliser les requêtes agrégées afin de regrouper les valeurs de plusieurs lignes de données selon certains critères pour former une valeur unique plus significative. A travers ce projet, nous allons renforcer ces notions en manipulant la base de données de l'âge d'or de la musique française. Nous allons explorer les infos des artistes, chansons et albums les plus populaires dans cette période afin d'en extraire des aperçus pertinents, tout en utilisant SQL. La compréhension de l'agrégation de données vous aidera à progresser dans une entreprise étant donné que les bases de données sont nécessaires pour toute organisation puisqu'elles servent à communiquer les informations facilement et efficacement.

Good to know

Know what's good

, what to watch for

, and possible dealbreakers

Propose des informations utiles sur les artistes, les chansons et les albums de l'âge d'or de la musique française

Permet d'explorer les tendances et les préférences musicales de cette période

Enseigne les requêtes agrégées SQL, essentielles pour manipuler et analyser des données

Exploite les requêtes agrégées SQL pour extraire des informations significatives à partir de plusieurs lignes de données

Renforce les compétences en manipulation de bases de données, ce qui est précieux dans de nombreuses industries

Peut nécessiter des connaissances préalables en bases de données pour suivre efficacement le cours

Activities

Be better prepared before your course. Deepen your understanding during and after it. Supplement your coursework and achieve mastery of the topics covered in Agrégation de Données avec des Requêtes SQL with these activities:

Revise SQL basics

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Sharpen your SQL skills to strengthen your foundation for aggregate queries.

Browse courses on SQL

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Review basic SQL syntax
Practice writing simple queries
Create a small database and populate it with data

Explore aggregate functions in SQL

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Enhance your understanding of aggregate functions by following guided tutorials tailored to your skill level.

Browse courses on SQL aggregate functions

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Find tutorials on SQL aggregate functions for beginners
Follow a tutorial that covers your desired aggregate functions
Practice using the aggregate functions in SQL queries

Solve SQL aggregate query exercises

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Reinforce your aggregate query skills through challenging exercises that test your understanding.

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Find online platforms or textbooks with SQL aggregate query exercises
Solve the exercises, focusing on applying the correct aggregate functions
Review your answers and identify areas for improvement

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Career center

Learners who complete Agrégation de Données avec des Requêtes SQL will develop knowledge and skills that may be useful to these careers:

Database Architect

Database Architects design and implement database systems. This course will help you build a foundation in SQL, a fundamental skill for this role. You will also learn how to use SQL aggregate queries to analyze and summarize data, which is essential for designing and implementing data-driven systems. This course may be particularly helpful if you want to work in an organization that relies heavily on database systems.

See salaries and explore the career path for Database Architect

Database Administrator

Database Administrators are responsible for managing and maintaining databases. This course will help you build a foundation in SQL, a fundamental skill for this role. You will also learn how to use SQL aggregate queries to analyze and summarize data, which is essential for database management. This course may be particularly helpful if you want to work in an organization that relies heavily on databases.

See salaries and explore the career path for Database Administrator

Data Engineer

Data Engineers design, build, and maintain data pipelines and infrastructure. This course will help you build a foundation in SQL, a fundamental skill for this role. You will also learn how to use SQL aggregate queries to analyze and summarize data, which is essential for building data pipelines and infrastructure. This course may be particularly helpful if you want to work in an organization that relies heavily on data.

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Information Architect

Information Architects design and implement information systems. This course will help you build a foundation in SQL, a fundamental skill for this role. You will also learn how to use SQL aggregate queries to analyze and summarize data, which is essential for designing and implementing data-driven systems. This course may be particularly helpful if you want to work in an organization that relies heavily on information systems.

See salaries and explore the career path for Information Architect

Data Analyst

Data Analysts use data to solve business problems and make informed decisions. This course will help you develop the skills necessary to analyze data and extract insights. You will learn how to group and aggregate data, which is a core skill for this role. You will also gain experience in working with SQL, a common tool for data analysts. This course may be particularly helpful if you want to work in a field that requires a strong understanding of data analysis and interpretation.

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Business Analyst

Business Analysts use data to analyze and improve business processes. This course will help you develop the skills necessary to analyze data and extract insights. You will learn how to group and aggregate data, which is a core skill for this role. You will also gain experience in working with SQL, a common tool for business analysts. This course may be particularly helpful if you want to work in a field that requires a strong understanding of data analysis and interpretation.

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Statistician

Statisticians use statistical methods to analyze data and draw conclusions. This course will help you build a foundation in SQL, a common tool for working with data. You will also learn how to use SQL aggregate queries to analyze and summarize data, which is essential for statistical analysis. This course may be particularly helpful if you want to work in a field that requires a strong understanding of statistics and data analysis.

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Information Security Analyst

Information Security Analysts protect computer systems and networks from security threats. This course will help you build a foundation in SQL, a common tool for working with security data. You will also learn how to use SQL aggregate queries to analyze and summarize security data, which is essential for detecting and preventing security threats. This course may be particularly helpful if you want to work in a field that requires a strong understanding of information security.

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Data Scientist

Data Scientists use statistical and analytical methods to extract insights from data. By taking this course, you will learn how to group and aggregate data, which is a core skill for this role. You will also gain experience in working with SQL, a common tool for data scientists. This course may be particularly helpful if you want to work in a field that requires a strong understanding of data analysis and interpretation.

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Data Visualization Specialist

Data Visualization Specialists use data to create visual representations that communicate insights. This course will help you build a foundation in SQL, a common tool for working with data. You will also learn how to use SQL aggregate queries to analyze and summarize data, which is essential for creating data visualizations. This course may be particularly helpful if you want to work in a field that requires a strong understanding of data visualization.

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Quantitative Analyst

Quantitative Analysts use mathematical and statistical methods to analyze financial data. This course will help you build a foundation in SQL, a common tool for working with financial data. You will also learn how to use SQL aggregate queries to analyze and summarize financial data, which is essential for making investment decisions. This course may be particularly helpful if you want to work in a field that requires a strong understanding of financial analysis.

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Actuary

Actuaries use mathematical and statistical methods to assess risk and uncertainty. This course will help you build a foundation in SQL, a common tool for working with risk and uncertainty data. You will also learn how to use SQL aggregate queries to analyze and summarize risk and uncertainty data, which is essential for making informed decisions. This course may be particularly helpful if you want to work in a field that requires a strong understanding of risk and uncertainty.

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Market Researcher

Market Researchers use data to analyze and understand consumer behavior. This course will help you develop the skills necessary to analyze data and extract insights. You will learn how to group and aggregate data, which is a core skill for this role. You will also gain experience in working with SQL, a common tool for market researchers. This course may be particularly helpful if you want to work in a field that requires a strong understanding of data analysis and interpretation.

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Chief Data Officer

A Chief Data Officer oversees the organization's data and analytics capabilities. By successfully completing this course, you will be able to apply SQL aggregate queries, a fundamental skill required in this role. You will also build a foundation for working with datasets and databases, which is essential for success in this career. This course may be particularly helpful if you want to work in a data-driven organization that relies on data insights to make informed decisions.

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Software Engineer

Software Engineers design, develop, and maintain software systems. This course will help you build a foundation in SQL, which is a common database technology used in software development. You will also learn how to use SQL aggregate queries to analyze and summarize data, which is essential for building data-driven applications. This course may be particularly helpful if you want to work on software projects that require data analysis and manipulation.

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