You often need data that are stored in separate tables. For example, you may want to produce a report that gets information about flight delays from one table and boarding capacity from another.

Key points: INNER JOIN → returns rows with matching values in both tables LEFT JOIN → returns all rows from the left table and matched rows from the right table RIGHT JOIN → returns all rows from the ...

Multiple Detail Records - 4 in this case. (linked to the header record) Multiple Inventory Records - again, 4 - (each detail record points to one specific inventory record, but the inventory may be ...

In the original proposal for the World Wide Web, Tim Berners-Lee wrote: A generic tool could perhaps be made to allow any database which uses a commercial DBMS to be displayed as a hypertext view. We ...

Thanks to the technology behind ChatGPT, it’s become surprisingly simple to query a data set in plain English. As with most generative AI, results from OpenAI’s API are still imperfect, which means ...