Question

I am trying to join all fields on 3 tables. I’ve tried nearly 7 queries all of which either take forever to load up (really slow) or throw errors.

I need to join all 3 table on table1 id field. All tables have corresponding id fields.

This is my latest experiment: (throws errors for duplicate rows)

SELECT * FROM 
(Select * FROM 
table1 as T1 JOIN 
table2 as T2 ON T1.dep_id=T2.dep_id WHERE 1) as T12
JOIN 
table3 as T3 ON T12.dep_id=T3.dep_id WHERE 1

Answer 1

try (UPDATE as per comments from OP):

SELECT * FROM TABLE1 T1 LEFT OUTER JOIN TABLE2 T2 ON T1.DEP_ID = T2.DEP_ID LEFT OUTER JOIN TABLE3 T3 ON T1.DEP_ID = T3.DEP_ID