微信小程序云数据库可以根据查询到的内容后再决定更新或者不更新吗？

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微信小程序云数据库可以根据查询到的内容后再决定更新或者不更新吗？Can the WeChat applet cloud database be updated or not updated based on the content queried?

Various gods ask for advice: cloud database wants to update a piece of information, but it does not ensure whether other users have operated before, so first query the database status, and then decide whether to update the information according to the returned information. Similar to rush buying, can query and update be operated at the same time? Do you have to wait for an execution to complete before calling an execution

回答：

db.collection('...')  .where({    ...  })  .update({    data: ...  })