Question

These are the tables that i have(I got this):

 table building: b_id(key relation with table build-works b_id):1 2 3 
 field1: buildingA, buildingB,
 buildingC

 table build-works: b_id:1 1 2 3 3 3
 w_id: 1 2 1 1 2 3

 table works: w_id(key relation with table build-works w_id): 1 2 3 4
 field1: electricity, sanitary, shell,
 roofing

Now I want to know the works per building?
How can i do this with sql, and can you give my the example also with zend_db?
Thanks

Answer 1

using left joins since its in the title

SELECT *
FROM   building b 
       LEFT JOIN buildworks bw 
         ON b.b_id = bw.b_od 
       LEFT JOIN works w 
         ON bw.w_id = w.w_id