Datenaggregation mit SQL

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In this Guided Project, you will:

Daten in Datenbanktabellen mithilfe von SQL-Aggregationsfunktionen zusammenfassen

Bedingungen in den Ergebnissen von Aggregationsfunktionen mit dem HAVING-Befehl verwirklichen

Statistische Fragen an die Daten stellen und mit SQL-Code beantworten

2 Stunden
No download needed
Split-screen video
Desktop only

In diesem zweistündigen Projekt wirst du Daten aus Datenbanktabellen mit dem SQL-GROUP-BY-Statement in Verbindung SQL-Aggregationsfunktionen abrufen. Wir werden die Aggregationsfunktionen COUNT(), SUM(), MIN(), MAX() und AVG() kennen lernen. Aggregationsfunktionen werden verwendet, um Zeilen einer Tabelle in einen einzigen Wert zusammen zu fassen. Außerdem wirst du lernen, wie du das gruppierten und aggregierten Ergebnis mit HAVING filtern kannst. Hinweis: Du musst kein Data Analyst sein, um in diesem angeleiteten Projekt erfolgreich zu sein! Grundlegende Kenntnis von SQL SELECT- und WHERE-Statements sollte genügen.

Skills you will develop

  • Datenbank

  • Datenaggregation

  • Datenanalyse

  • Datenmanagement

  • SQL

Learn step-by-step

In a video that plays in a split-screen with your work area, your instructor will walk you through these steps:

  1. Zählen mit COUNT

  2. Gruppieren mit GROUP BY

  3. Aggregierte Daten filtern mit HAVING

  4. Datenauswertungen mit MIN & MAX

  5. Datenauswertungen mit SUM, AVG, ROUND

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In a split-screen video, your instructor guides you step-by-step

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