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## drop 删除一个collection ~~~ const MongoClient = require('mongodb').MongoClient; var url = 'mongodb://localhost:27017/'; MongoClient.connect(url, { useNewUrlParser: true }, (err, client) => { if (err) throw err; var test = client.db('test'); test.collection('douban').drop((err,delOK)=>{ if(err) throw err; if(delOK) console.log("collection deleted") client.close() }) }) ~~~ ## drop-collection ~~~ const MongoClient = require('mongodb').MongoClient; var url = 'mongodb://localhost:27017/'; MongoClient.connect(url, { useNewUrlParser: true }, (err, client) => { if (err) throw err; var test = client.db('test'); test.dropCollection('douban',(err,delOK)=>{ if(err) throw err; if(delOK) console.log('collection delete'); client.close() }) }) ~~~