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learn-pr/achievements/work-with-data-warehouses-using-microsoft-fabric.svg

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learn-pr/azure-databases/postgresql/basic-sql-aggregate-functions-grouping/1-introduction.yml

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### YamlMime:ModuleUnit
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uid: learn.wwl-azure.basic-sql-aggregate-functions-grouping.introduction
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uid: learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.introduction
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title: Introduction
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metadata:
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title: Introduction
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description: "This unit introduces the importance of data summarization and analysis using aggregate functions in PostgreSQL. It explains how GROUP BY and HAVING clauses support meaningful reporting by transforming raw data into actionable insights."
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author: milenak
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learn-pr/azure-databases/postgresql/basic-sql-aggregate-functions-grouping/2-sample-database-overview.yml

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### YamlMime:ModuleUnit
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uid: learn.wwl-azure.basic-sql-aggregate-functions-grouping.sample-database-overview
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uid: learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.sample-database-overview
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title: Sample database
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metadata:
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title: Sample database overview
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description: "This unit introduces the structure and purpose of the sales sample database used throughout the module. It describes the key tables, their relationships via foreign keys, and how the database supports tracking orders, inventory, and customer activity. A schema diagram and SQL script are provided to help learners explore and understand the data model."
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learn-pr/azure-databases/postgresql/basic-sql-aggregate-functions-grouping/3-aggregate-functions.yml

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### YamlMime:ModuleUnit
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uid: learn.wwl-azure.basic-sql-aggregate-functions-grouping.aggregate-functions
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uid: learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.aggregate-functions
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title: Aggregate Functions
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metadata:
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title: Aggregate Functions
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description: "This unit introduces key SQL aggregate functions such as COUNT, SUM, AVG, MIN, and MAX in the context of PostgreSQL. It explains how each function works through examples using the sales database, helping learners summarize and analyze data by calculating totals, averages, and identifying extreme values."
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learn-pr/azure-databases/postgresql/basic-sql-aggregate-functions-grouping/4-group-by-having.yml

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### YamlMime:ModuleUnit
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uid: learn.wwl-azure.basic-sql-aggregate-functions-grouping.group-by-having
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uid: learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.group-by-having
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title: GROUP BY and HAVING
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metadata:
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title: GROUP BY and HAVING
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description: "This unit explains how to use the GROUP BY and HAVING clauses in PostgreSQL to categorize data and filter grouped results. Learners explore how to combine these clauses with aggregate functions to analyze trends and summarize information within distinct groups. Practical examples from the sales database illustrate how to generate meaningful reports from raw data."
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learn-pr/azure-databases/postgresql/basic-sql-aggregate-functions-grouping/5-summary.yml

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### YamlMime:ModuleUnit
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uid: learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.summary
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title: Summary
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metadata:
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title: Summary
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description: "This unit summarizes key concepts related to aggregate functions and grouping in PostgreSQL. It reinforces the use of COUNT, SUM, AVG, MIN, MAX, and the GROUP BY and HAVING clauses to perform data analysis and generate meaningful summaries. Learners review the core techniques needed to extract insights from relational databases."
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learn-pr/azure-databases/postgresql/basic-sql-aggregate-functions-grouping/includes/2-sample-database-overview.md

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learn-pr/azure-databases/postgresql/basic-sql-aggregate-functions-grouping/index.yml

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### YamlMime:Module
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uid: learn.wwl-azure.basic-sql-aggregate-functions-grouping
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uid: learn.azure-databases.postgresql.basic-sql-aggregate-functions-grouping
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metadata:
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title: "Summarizing data: Aggregate functions and grouping"
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description: "Analyze data in PostgreSQL with aggregate functions and grouping. Learn COUNT, SUM, AVG, and filter results using GROUP BY and HAVING."
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subjects:
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- databases
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units:
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- learn.wwl-azure.basic-sql-aggregate-functions-grouping.introduction
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- learn.wwl-azure.basic-sql-aggregate-functions-grouping.sample-database-overview
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- learn.wwl-azure.basic-sql-aggregate-functions-grouping.aggregate-functions
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- learn.wwl-azure.basic-sql-aggregate-functions-grouping.group-by-having
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- learn.wwl-azure.basic-sql-aggregate-functions-grouping.summary
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- learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.introduction
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- learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.sample-database-overview
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- learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.aggregate-functions
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- learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.group-by-having
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- learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.summary
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badge:
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uid: learn.wwl-azure.basic-sql-aggregate-functions-grouping.badge
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uid: learn.azure-database.postgresql.basic-sql-aggregate-functions-grouping.badge

learn-pr/azure-databases/postgresql/basic-sql-join-tables/1-introduction.yml

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uid: learn.azure-database.postgresql.basic-sql-join-tables.introduction
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title: Introduction
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metadata:
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title: Introduction
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description: "This unit introduces the concept of SQL joins in PostgreSQL, explaining how to combine data from multiple related tables using INNER JOIN, LEFT JOIN, RIGHT JOIN, FULL OUTER JOIN, and NATURAL JOIN. It sets the stage for learning how to query interconnected data efficiently in real-world relational database scenarios."
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author: milenak
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ms.author: mpopovic
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ms.topic: unit

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