Retrieve Data with Multiple-Table SQL Queries

Overview

Class Central Tips

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. Note: This course works best for learners who are based in the North America region. We’re currently working on providing the same experience in other regions.

Syllabus

Multiple-Table SQL Queries

In this course you will be introduced to two methods of writing an SQL query that retrieves 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 more than one table. Often, output from the database requires data from more than one table. For example, the output 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. Just as the entities (student, course, section) in a school are related, databases are very carefully designed so that the tables are all related through the use of common columns. As a query writer you will need to develop an understanding of table relationships and how they are represented in an SQL query. The SQLiteStudio platform will be used to provide you with hands-on experience writing queries that access rows and columns of data from two or more tables. In addition, you’ll be practicing many of the skills introduced in the Single-Table SQL Queries course.