इसे आजमाएं:
(select * from T1 minus select * from T2) -- all rows that are in T1 but not in T2
union all
(select * from T2 minus select * from T1) -- all rows that are in T2 but not in T1
;
कोई बाहरी उपकरण नहीं। union all
के साथ कोई प्रदर्शन समस्या नहीं है ।