SELECT
A.VALUE "GC BLOCKS LOST 1",
B.VALUE "GC BLOCKS CORRUPT 1",
C.VALUE "GC BLOCKS LOST 2",
D.VALUE "GC BLOCKS CORRUPT 2"
FROM GV$SYSSTAT A, GV$SYSSTAT B, GV$SYSSTAT C, GV$SYSSTAT D
WHERE A.INST_ID=1 AND A.NAME='gc blocks lost'
AND B.INST_ID=1 AND B.NAME='gc blocks corrupt'
AND C.INST_ID=2 AND C.NAME='gc blocks lost'
AND D.INST_ID=2 AND D.NAME='gc blocks corrupt';
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