Thanks Effigy,
Would what I've done be considered incorrect or (more importantly) detrimental to my database?
table_a
ID, name
REL_table_a__table_b
ID, table_a_ID, description
SELECT table_a.name, table_b.description FROM table_a, REL_table_a__table_b WHERE table_a.ID = REL_table_a__table_b.table_a_ID
**Pls excuse my bad sql example**
I understand why not to use ID in the REL_ table (not needed as table_a_ID in the REL_ table is sufficient) - I may now remove it.
Also - what was your query for google? I cant seem to find the right words and I'd really like more information on the usage of "REL_" neither of your examples mentioned "REL_"