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
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.
Datenbank
Datenaggregation
Datenanalyse
Datenmanagement
SQL
In a video that plays in a split-screen with your work area, your instructor will walk you through these steps:
Zählen mit COUNT
Gruppieren mit GROUP BY
Aggregierte Daten filtern mit HAVING
Datenauswertungen mit MIN & MAX
Datenauswertungen mit SUM, AVG, ROUND
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