Slide 37
Slide 37 text
select pk, src_col, src_val
from (
select pk, src_col, src_val,
0 old_c, 1 new_c
from tab_1 unpivot ( … )
union all
select pk, src_col, src_val,
1 old_c, 0 new_c
from tab_2 unpivot ( … )
)
group by pk, src_col, src_val
having sum ( old_c ) <> sum ( new_c )
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