November 2025
Beginner to intermediate
336 pages
7h 48m
English
book
SQL for Data Analytics - Fourth Edition
by Jun Shan, Haibin Li, Matt Goldwasser, Upom Malik, Benjamin Johnston
Content preview from SQL for Data Analytics - Fourth Edition
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2
Creating Tables with Solid Structures
Most of the operations in a relational database are organized around tables and the data inside them. The operations in the lifecycle of data generally can be categorized into four groups—create, read, update, and delete, or CRUD. To utilize any data, you must create the definition of the table first, then populate the table with data records. Once a dataset is created, you can read all aspects of information from it. If there is any need to change the data, you need to update the affected records. After the update operation, you may need to read the updated data again. And finally, when you do not need the data anymore, you will want to delete the records to save storage costs and increase performance. ...
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