mysql查询从三个表中选择数据

Question

wall_paths (table)

wall_dimensions

dimensions (reference table)

What I've got so far:

Query

SELECT wall_paths.wall_id, wall_paths.wall_path, 
       dimensions.width, dimensions.height
FROM wall_paths
LEFT JOIN wall_dimensions
ON wall_paths.wall_id = wall_dimensions.wall_id
LEFT JOIN dimensions
ON wall_dimensions.dimension_id = dimensions.dimension_id
WHERE wall_paths.wall_id = 4;

Result

The query is selecting redundant rows, I just would like to select the two paths along with the corresponding dimensions based on the wall_dimensions table. Something like below:

Expected result

Result with GROUP BY in query

Please help on how to select something like the above.

Note: I've tried DISTINCT as well on the query but returns an error.

Answer 1

The query results are as expected, actually. Makes sense when you see it, data-wise. The data model is setup incorrectly for this query.

Fiddle (original data model): http://sqlfiddle.com/#!2/8c1bf/1

Fiddle (modified data model): http://sqlfiddle.com/#!2/3d9b0/5

Not saying you should change your model, just pointing out the query runs as expected with the current schema.