Retrieve Data from Multiple-Table SQL Queries

von
Rhyme
In diesem Guided Project werden Sie:

Explain the need for multiple-table queries in data retrieval.

Generate successful SQL multiple-table queries for data retrieval.

Recognize relationships among tables in a relational database.

Clock50 minutes
IntermediateMittel
CloudKein Download erforderlich
VideoVideo auf geteiltem Bildschirm
Comment DotsEnglisch
LaptopNur Desktop

In this course you will be introduced to two methods of writing SQL queries that retrieve data from two or more tables. Since one of the functions of a database is to store data in an organized format, many databases are made up of multiple tables. Often, the data output required from the database is made up of data from more than one table. For example, the data that populates a student transcript might come from the Student, Course, and Section tables. While the Student table may provide the student’s name, the name and number of the course might come from the Course table and the specific grade for that course may come from yet another table. While writing SQL queries in SQLiteStudio, you'll learn the SQL syntax required to join tables together as you develop an understanding of how the relationships among tables come into play.

Kompetenzen, die Sie erwerben werden

Data AnalysisSql CommandsRelational DatabaseSQLiteStudio

Schritt für Schritt lernen

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

  1. Joining Two Tables with WHERE

  2. Understanding Table Relationships

  3. Joining Three or More Tables

  4. Adding Selection into the WHERE clause

  5. The INNER JOIN

  6. The LEFT JOIN

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