Find centralized, trusted content and collaborate around the technologies you use most.
Teams
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
为什么查询：{ $or: [ {tags: {$in: ['foo']}}, {tags: {$nin: ['bar']}} ] }不使用索引tags？
{ $or: [ {tags: {$in: ['foo']}}, {tags: {$nin: ['bar']}} ] }
tags