摘要:
update B b set b.value=(select max(a.value) from A a where b.key=a.key) where exists(select 1 from A c where b.key=c.key) UPDATE A a,(select a.`key`,b.`value` from A INNER JOIN B on a.`key`=b.`key`... 阅读全文
摘要:
sklearn.metrics.pairwise.cosine_similarityhttp://scikit-learn.org/stable/modules/generated/sklearn.metrics.pairwise.cosine_similarity.html#sklearn.met 阅读全文
摘要:
怎样快速找出两个数组中相同的元素? NumPy数组的集合运算 输出: 阅读全文