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.
Retrieve Data with Multiple-Table SQL Queries
Retrieve Data with Multiple-Table SQL Queries
位教师：Judy Richardson
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您将学到什么
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.
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关于此指导项目
分步进行学习
在与您的工作区一起在分屏中播放的视频中，您的授课教师将指导您完成每个步骤：
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Joining Two Tables with WHERE
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Understanding Table Relationships
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Joining Three or More Tables
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Adding Selection into the WHERE clause
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The INNER JOIN
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The LEFT JOIN
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通过完成与工作相关的任务来练习新技能。
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已于 Apr 5, 2021审阅
the work space is too busy, it is difficult to read or follow the session without interrupting the practical lesson and stopping the video.
已于 Jul 8, 2020审阅
Instructor presented material in a down to earth fashion which made the material easy to understand.
已于 Sep 16, 2020审阅
Nice and to the point explanations of the joins mentioned. Good for beginners. Wish they also added Self-Join as well.
