Mongodb creates an implicit database as an exercise

try { db.comment.insertMany([ {“_id”:“1”,“articleid”:“100001”,“content”:“ We shouldn't waste the morning on cell phones , Health is very important , A cup of warm water makes you and me happy He .”,“userid”:“1002”,“nickname”:“ Forget about the Jianghu ”,“createdatetime”:new Date(“2019-08- 05T22:08:15.522Z”),“likenum”:NumberInt(1000),“state”:“1”}, {“_id”:“2”,“articleid”:“100001”,“content”:“ I drink cold boiled water on an empty stomach in summer , Drink warm water in winter ”,“userid”:“1005”,“nickname”:“ The Iraqi are haggard Haggard ”,“createdatetime”:new Date(“2019-08-05T23:58:51.485Z”),“likenum”:NumberInt(888),“state”:“1”}, {“_id”:“3”,“articleid”:“100001”,“content”:“ I drink cold water all the time , Drink in winter and summer .”,“userid”:“1004”,“nickname”:“ Jack boat Long ”,“createdatetime”:new Date(“2019-08-06T01:05:06.321Z”),“likenum”:NumberInt(666),“state”:“1”}, {“_id”:“4”,“articleid”:“100001”,“content”:“ Experts say you can't eat on an empty stomach , Affect health .”,“userid”:“1003”,“nickname”:“ kay scatter ”,“createdatetime”:new Date(“2019-08-06T08:18:35.288Z”),“likenum”:NumberInt(2000),“state”:“1”}, {“_id”:“5”,“articleid”:“100001”,“content”:“ Studies have shown that , Just boiled water must not be drunk , Because it's hot mouth .”,“userid”:“1003”,“nickname”:“ Caesar ”,“createdatetime”:new Date(“2019-08- 06T11:01:02.521Z”),“likenum”:NumberInt(3000),“state”:“1”} ]); } catch (e) { print (e); }