Focus on this objective today: Query and analyze data: Select, filter, and aggregate data by using SQL. Explain it in your own words, apply it to one realistic scenario, and verify the details against the official source. Source context: Read in English Summarizing data: Aggregate functions and grouping Module 5 Units Feedback Beginner Database Administrator Developer Azure Database for PostgreSQL This module introduces aggregate functions in SQL, which are essential for analyzing data. You learn how to use functions like COUNT, SUM, AVG, MIN and MAX, group data using the GROUP BY clause and filter grouped results with the HAVING clause. Learning objectives By the end of this module, you'll be able to: Understand the role of aggregate functions in data analysis Use COUNT to count all rows or distinct values in a column Use SUM to calculate the total of values in a numeric column Use AVG to compute the average of numeric values in a column Use MIN and MAX to find the lowest and highest values in a column Group data using GROUP BY to apply aggregate functions to each group Differentiate between GROUP BY and DISTINCT, and use GROUP BY even without aggregate functions to list unique values Use HAVING to filter grouped results based on aggregate function outcomes Add Prerequisites Before starting this module, you should have a basic understanding of SQL SELECT statement.
Objective
Query and analyze data: Select, filter, and aggregate data by using SQL