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Product typeBook
Published inNov 2023
PublisherPackt
ISBN-139781803240282
Edition1st Edition
Concepts
Data Analysis
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Bernard Obeng Boateng
Bernard Obeng Boateng
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Bernard Obeng Boateng

Bernard Obeng Boateng is a Microsoft Excel MVP, Microsoft Certified Trainer, with over 10 years work experience in Banking, Insurance and Business Development. He is founder of Finex Skills Hub an approved Training Provider of the Financial Modeling Institute, Canada. Finex Skills Hub runs the Finex Project in Ghana, a pro bono student training outreach program for students in Data Analytics and Financial Modeling. Bernard also provides consultancy services for SMEs (start-ups and existing) in Financial Management, Business Planning and Research. He has an active audience online with about 17,000 followers on his LinkedIn Account. where he shares tips and tricks on Microsoft Excel and other Office Apps.
Read more about Bernard Obeng Boateng

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Understanding the role of primary keys and foreign keys

Keys are very important in a relational database because they help create a relationship between two tables and ensure that each record in a table can be identified in a unique way. When we connect the related tables, the version of the connecting columns in the dimension tables is called the primary key while the version in the fact table is called the foreign key.

In a relational database, the primary key helps us identify a single row in a table. All primary keys must be unique in the columns where they sit. Foreign keys help connect our dimension and fact tables and, more importantly, make our fact tables accessible in our calculations. Foreign keys are typically not unique.

Going back to our mock view of our relational database, we can add primary keys and foreign keys, as shown here:

Figure 2.8: Assigning primary keys and foreign keys

Figure 2.8: Assigning primary keys and foreign keys

In our data model, these primary keys will be linked...

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Data Modeling with Microsoft Excel
Published in: Nov 2023Publisher: PacktISBN-13: 9781803240282
© 2023 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Bernard Obeng Boateng

Bernard Obeng Boateng is a Microsoft Excel MVP, Microsoft Certified Trainer, with over 10 years work experience in Banking, Insurance and Business Development. He is founder of Finex Skills Hub an approved Training Provider of the Financial Modeling Institute, Canada. Finex Skills Hub runs the Finex Project in Ghana, a pro bono student training outreach program for students in Data Analytics and Financial Modeling. Bernard also provides consultancy services for SMEs (start-ups and existing) in Financial Management, Business Planning and Research. He has an active audience online with about 17,000 followers on his LinkedIn Account. where he shares tips and tricks on Microsoft Excel and other Office Apps.
Read more about Bernard Obeng Boateng

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