oracle多表链接查询，统计求和，分组

SELECT c.typeName siteName, NVL (SUM(o.recommCount), 0) recommCount, NVL (SUM(o.acceptCount), 0) acceptCount FROM w1 o RIGHT JOIN w2 n ON o.info_id = n. ID AND n.PUBYEAR='2019' RIGHT JOIN w3 c ON

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