sql多对多关系只有2个表

Question

So I have two tables I need to join for a client. These tables only share 1 field in common (COLOR, and it isn't a unique key ident). Is is possible to join/relate these two tables?

So let's say theoretically I have two tables with COLOR and a COLOR ATTRIBUTE, as follows:

+-------+----------+
| COLOR |   NAME   |
+-------+----------+
| red   | brian    |
| red   | ben      |
| red   | tom      |
| red   | jennifer |
| blue  | tom      |
| blue  | billy    |
| blue  | michelle |
+-------+----------+  

And another table that is ONLY related by the color column, but has multiple color weights:

+-------+--------+
| COLOR | WEIGHT |
+-------+--------+
| red   |     12 |
| red   |      3 |
| red   |     11 |
| blue  |      4 |
| blue  |     23 |
| blue  |      7 |
| blue  |      5 |
| blue  |     10 |
+-------+--------+  

So how can I join these two tables given ONLY the color column is shared? What would the result look like? Thanks in advance!

Answer 1

While color is not a unique identifier, if you plan to perform a join on it, it will be treated as such.

SELECT * FROM Table1 t1
LEFT JOIN Table2 t2
ON t1.COLOR = t2.COLOR
ORDER BY COLOR DESC;

This outputs three columns with 12 "red rows" and 15 "blue rows."