我將與Oracle語法向Postgres甲骨文選擇語法向Postgres
SELECT MSN_INT_ID,
MO_INT_ID,
'Y' "AIRMOVE"
FROM MISSION_OBJECTIVE
WHERE MO_MSN_CLASS_CD = 'AMV'
GROUP BY MSN_INT_ID,
MO_INT_ID
這部分是困惑我:
SELECT MSN_INT_ID,
MO_INT_ID,
'Y' "AIRMOVE"
什麼是 'Y' 「AIRMOVE」 幹什麼?