例如: 我现在要查询文章列表, 我之前看过的文章就不再显示了。 db.wenzhang.find({"red":{"$nin":[ 另一个表中得数据 另一个 find ]}})
类似 sql 的 Select * from TableName where a not in (select a from TableName2) as abc
mongo does not support this type of union search Suggestion to improve your own design
mongo does not support this type of union search
Suggestion to improve your own design