Dear all, I have a syntax problem but I don't find the clue. Actually I adapt an mySQL query to a postgreSQL but I got a message error that I can't interpret. SELECT g.id, t1.name, substring(g.path, 1, (6*(-1+l.id)) + 5) as subpath,l.id-1 as level FROM graph_path g INNER JOIN term AS t1 INNER JOIN term AS t2 ON (t2.id = g.term2_id) INNER JOIN levels l ON (substring(path, 1+(6*(-1+l.id)), 5) = t1.id AND g.distance+1 >= l.id) WHERE t2.name = 'blood_coagulation' and g.term1_id=1 ORDER BY g.id, subpath; ERROR: syntax error at or near "WHERE" at character 284 LINE 7: WHERE t2.name = 'blood_coagulation' and g.term1_id=1 Let me know if you need details concerning the tables but I don't think it is necesseray. Hopefully I did a newbie mistake. Thanks in advance, Fred