SQL & PL/SQL :: Concatenating Address Fields

The pipe separator needs to appear only when values found in addr1 or addr2 or addr3.

WITH address AS (SELECT 'Silver Arc Plaza,' addr1,'4th Floor, 20/1, New Palasia' addr2,'Indore' addr3 FROM dual UNION ALL
SELECT 'Shop No. 1,Vishnu Priya Building,' addr1,'' addr2,'pune' addr3 FROM dual UNION ALL
SELECT 'D/7, Siddhivinayak Nagari,' addr1,'Nr. Majura Gate, Ghod dod Road,' addr2,'' addr3 FROM dual UNION ALL
SELECT '' addr1,'B 4, Gold Coin Complex,' addr2,'Ahmedabad' addr3 FROM dual UNION ALL
SELECT '' addr1,'' addr2,'' addr3 FROM dual)
select addr1||'|'||addr2||'|'||addr3 address from address;