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CREATE TABLE t ( `ID` INTEGER, `TEST_RESULT` VARCHAR(9), `DIAGNOSIS` VARCHAR(3) ); INSERT INTO t (`ID`, `TEST_RESULT`, `DIAGNOSIS`) VALUES ('2', 'POSITIVE', 'X78'), ('2', 'NEGATIVE', 'U98'), ('3', 'POSITIVE', 'U98'), ('4', 'NFEGATIVE', 'Y55');
✓
select ID ,TEST_RESULT ,DIAGNOSIS from ( select * ,min(TEST_RESULT) over w as mn ,max(TEST_RESULT) over w as mx from t window w as (partition by ID) ) t where mn <> mx
ID
TEST_RESULT
DIAGNOSIS
2
POSITIVE
X78
2
NEGATIVE
U98