db.test_collection.remove()
Error: remove needs a query :
DBCollection.prototype._parseRemove@src/mongo/shell/collection.js:356:1
DBCollection.prototype.remove@src/mongo/shell/collection.js:383:18
> db.test_collection.remove({c:2})
WriteResult({ "nRemoved" : 3 })
> db.test_collection.drop() true
show tables
原文：https://www.cnblogs.com/wzndkj/p/9388607.html