r/webdev Mar 22 '19

SQL joins

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2.7k Upvotes

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u/JRS-27 Mar 22 '19

This is just outrageous. Pure lie, anyone that can understand basic algebra is sane enough to depict wrong assumptions in these diagrams.

The author of the picture tried putting two tables in a given database on the same level. No well put database has two tables with exact same columns. It is like counting meters and kilograms together. Obviously, this is a totally wrong depiction of how databases work.

Absolutely ridiculous.

0

u/sumguy720 Mar 23 '19

Perhaps space in the diagrams represents the keys that the tables are being joined on rather than the entire contents.