[英]select max value of a column only from certain rows
你很亲密 您需要一个关联子句:
select t.name
from myschema.table1 t
where COL1 = 'A'and COL2= 'B' and
LEVEL = (select max(t2.LEVEL)
from myschema.table1 t2
where t2.col1 = t.col1 and g2.col2 = t.col2 and t2.USERTYPE = 'C'
);
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