Performing Data Aggregation using SQL Aggregate Functions

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In diesem angeleitetes Projekt werden Sie:

Retrieve data as summaries from tables of a database using SQL aggregate functions

Understand how to set conditions on the result set of an aggregate functions using the HAVING clause

Clock2 hours
IntermediateMittel
CloudKein Download erforderlich
VideoVideo auf geteiltem Bildschirm
Comment DotsEnglisch
LaptopNur Desktop

In this 2-hour long project-based course, you will learn how to retrieve data from tables in a database using SQL SELECT statement with SQL Aggregate functions. The aggregate functions we will consider in this project are COUNT, SUM, MIN, MAX and AVG. Aggregate functions are used to summarize data from rows of a table into a single value. In addition, you will learn how to set conditions on the output of an aggregate function using the HAVING clause. Finally, you will learn how to tidy up the result set of aggregate functions using the ROUND function. Note: You do not need to be a data administrator or data analyst to be successful in this guided project, just a familiarity with querying databases using SQL SELECT statement suffice for this project. If you are not familiar with SQL and want to learn the basics, start with my previous guided projects titled “Performing Data definition and Manipulation in SQL." and “Querying Databases using SQL SELECT statement”

Kompetenzen, die Sie erwerben werden

  • Data Management
  • Data Manipulation
  • Relational Database
  • Postgresql
  • Data Aggregation

Schritt für Schritt lernen

In einem Video, das auf einer Hälfte Ihres Arbeitsbereichs abgespielt wird, führt Sie Ihr Dozent durch diese Schritte:

  1. Retrieve data from the employees database

  2. Retrieve data from the employees database using the COUNT function

  3. Select distinct data from fields of a table and use the GROUP BY statement

  4. Use the HAVING clause to set conditions on aggregate functions

  5. Retrieve data from the employees database using the SUM function

  6. Retrieve data from the employees database using the MIN & MAX functions

  7. Retrieve data from the employees database using the AVG function

  8. Use ROUND to tidy up the result set of aggregate functions

Ablauf angeleiteter Projekte

Ihr Arbeitsbereich ist ein Cloud-Desktop direkt in Ihrem Browser, kein Download erforderlich

Ihr Dozent leitet Sie in einem Video mit geteiltem Bildschirm Schritt für Schritt an.

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