As data collection has increased exponentially, so has the need for people skilled at using and interacting with data; to be able to think critically, and provide insights to make better decisions and optimize their businesses. This is a data scientist, “part mathematician, part computer scientist, and part trend spotter” (SAS Institute, Inc.). According to Glassdoor, being a data scientist is the best job in America; with a median base salary of $110,000 and thousands of job openings at a time. The skills necessary to be a good data scientist include being able to retrieve and work with data, and to do that you need to be well versed in SQL, the standard language for communicating with database systems.
SQL für Data Science
Gain insight into a topic and learn the fundamentals.
4.3
(28 reviews)
Beginner level
No prior experience required
13 hours to complete
3 weeks at 4 hours a week
Flexible schedule
Learn at your own pace
What you'll learn
Identify a subset of data needed from a column or set of columns and write a SQL query to limit to those results.
Use SQL commands to filter, sort, and summarize data.
Create an analysis table from multiple queries using the UNION operator.
Manipulate strings, dates, & numeric data using functions to integrate data from different sources into fields with the correct format for analysis.
Details to know
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Assessments
12 assignments
Taught in German
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There are 4 modules in this course
In diesem Modul lernen Sie, SQL zu definieren und zu diskutieren, wie sich SQL von anderen Computersprachen unterscheidet. Sie werden in der Lage sein, die Rollen eines Datenbankadministrators und eines Data Scientist zu vergleichen und die Unterschiede zwischen Eins-zu-eins-, Eins-zu-viele- und Viele-zu-viele-Beziehungen mit Datenbanken zu erklären. Sie werden in der Lage sein, die SELECT-Anweisung zu verwenden und einige grundlegende Syntaxregeln zu erläutern. Sie werden in der Lage sein, Kommentare in Ihren Code einzufügen und dessen Bedeutung zu erfassen.
What's included
11 videos2 readings4 assignments2 discussion prompts
In diesem Modul lernen Sie, mehrere neue Klauseln und Operatoren zu verwenden, darunter WHERE, BETWEEN, IN, OR, NOT, LIKE, ORDER BY und GROUP BY. Sie werden in der Lage sein, die Platzhalterfunktion zu nutzen, um nach spezifischeren Datensätzen oder Teilen von Datensätzen zu suchen, einschließlich ihrer Vor- und Nachteile, und wie man sie am besten einsetzt. Sie werden in der Lage sein, die Verwendung grundlegender mathematischer Operatoren sowie von Aggregatfunktionen wie AVERAGE, COUNT, MAX, MIN und anderen zu diskutieren, um mit der Analyse unserer Daten zu beginnen.
What's included
9 videos1 reading3 assignments
In diesem Modul lernen Sie, Unterabfragen zu erörtern, einschließlich ihrer Vor- und Nachteile und wann sie zu verwenden sind. Sie können sich an das Konzept eines Schlüsselfeldes erinnern und erörtern, wie diese uns helfen, Daten mit Verknüpfungen zu verknüpfen. Sie werden in der Lage sein, verschiedene Arten von Verknüpfungen zu identifizieren und zu definieren, darunter die kartesische Verknüpfung, die innere Verknüpfung, linke und rechte Verknüpfungen, vollständige äußere Verknüpfungen und die Selbstverknüpfung. Sie werden in der Lage sein, Aliase und Präqualifikatoren zu verwenden, um Ihren SQL-Code ordentlicher und effizienter zu gestalten.
What's included
10 videos2 readings3 assignments1 discussion prompt
In diesem Modul werden Sie lernen, wie Sie Zeichenketten durch Verketten, Trimmen, Ändern der Groß- und Kleinschreibung und die Verwendung der Teilzeichenfolgen-Funktion verändern können. Sie werden in der Lage sein, die Datums- und Uhrzeitzeichenfolgen genau zu besprechen. Sie werden in der Lage sein, Case-Anweisungen zu verwenden und dieses Modul mit einer Diskussion über Daten-Governance und Profiling abzuschließen. Sie werden auch in der Lage sein, grundlegende Prinzipien bei der Verwendung von SQL für Data Science anzuwenden. Sie werden in der Lage sein, Tipps und Tricks zu nutzen, um SQL in einem Data-Science-Kontext anzuwenden.
What's included
10 videos3 readings2 assignments1 peer review1 discussion prompt
Instructor
Instructor ratings
4.9 (9 ratings)
Offered by
Recommended if you're interested in Data Analysis
University of Colorado System
Duke University
University of Colorado Boulder
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