Data Analytics and Video Tutorials
You can use a foreign key on a column to join another database table who has a primary key of the same values.
When running an sql select query, most likely we may have a need to bring in data from other tables. The reason for this is that tables have a specific purpose for the data they store. One of the most important features of a data architecture is to avoid duplication. This has the impact of…
When working with databases in your data analytics projects, most likely you will deal with more than one table. As a result in certain scenarios there will be a link between the tables This will ensure that you can use data from the two or more tables that can be joined together. But how would…