How To Run A Left Join Query To Get Coulums In One Table? on wordpress postmeta table

Hello,
I have data saved in wordpress postmeta table, each post_id has some meta_keys, the table looks like this:

-------------------------------------post_id |  meta_key   | meta_value  |------------------------------------------   1	  | project_id	|	1			  |------------------------------------------   1	  |  height		 |	50			|------------------------------------------   1	  |  width		  |	100		  |------------------------------------------   2	  | project_id	|	2			  |------------------------------------------   2	  |  height		|	50			 |------------------------------------------   2	  |  width		 |	100		   |------------------------------------------

Now I need to query all the meta_keys and their value. (I don't need query_posts, I need the meta data only)

I tried the following code, but can't get the results I need:

$query = <<<QUERYSELECT  project_id.post_id, height.meta_value,width.meta_valueFROM $wpdb->postmeta project_idLEFT JOIN  $wpdb->postmeta height			on height.post_id = project_id.post_id			and height.meta_key = 'height'LEFT JOIN  $wpdb->postmeta width			on width.post_id = project_id.post_id			and width.meta_key = 'width'WHERE	   project_id.meta_key = 'project_id'ORDER BY	project_id.meta_value+(0) ASCQUERY;

The code get all projects, each project has 3 keys and their value-- one post_id, one meta_key, one meta_value, that's not what I want. I want one post_id with all meta_keys and their value.

Would anybody kindly spend time to help me on this?

I want one post_id with all meta_keys and their value.

Seems that you need to add a "group by" condition on post_id.