get cids of customers who both product p01 and product p09的关系表达式
SELECT cid FROM orders WHERE pid = 'p01' INTERSECT SELECT cid FROM orders WHERE pid = 'p09'
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SELECT cid FROM orders WHERE pid = 'p01' INTERSECT SELECT cid FROM orders WHERE pid = 'p09'
原文地址: http://www.cveoy.top/t/topic/eX8w 著作权归作者所有。请勿转载和采集!