deleteOne
删除符合条件的一条数据
{ "_id" : ObjectId("5afd209e2c63ae1a943bdb20"), "bar" : "test" } { "_id" : ObjectId("5afd21502c63ae1a943bdb21"), "a" : "b" } { "_id" : ObjectId("5afd21502c63ae1a943bdb22"), "c" : "d" } { "_id" : ObjectId("5afd25062c63ae1a943bdb23"), "bar" : "test" } { "_id" : ObjectId("5afd254e2c63ae1a943bdb24"), "bar" : "test" }
结果
db.test.deleteOne({"bar":"test"}) { "_id" : ObjectId("5afd21502c63ae1a943bdb21"), "a" : "b" } { "_id" : ObjectId("5afd21502c63ae1a943bdb22"), "c" : "d" } { "_id" : ObjectId("5afd25062c63ae1a943bdb23"), "bar" : "test" } { "_id" : ObjectId("5afd254e2c63ae1a943bdb24"), "bar" : "test" }
deleteMany
输出符合条件的多条数据
db.test.deleteMany({"bar":"test"}) { "_id" : ObjectId("5afd21502c63ae1a943bdb21"), "a" : "b" } { "_id" : ObjectId("5afd21502c63ae1a943bdb22"), "c" : "d" }
remove
删除符合条件的多条数据,没发现和deleteMany之间的区别有知道的麻烦评论
原始数据 { "_id" : ObjectId("5afd21502c63ae1a943bdb21"), "a" : "b" } { "_id" : ObjectId("5afd21502c63ae1a943bdb22"), "c" : "d" } { "_id" : ObjectId("5afd2ac32c63ae1a943bdb25"), "a" : "b" } { "_id" : ObjectId("5afd2ac32c63ae1a943bdb26"), "c" : "d" } db.test.remove({"a":"b"}) { "_id" : ObjectId("5afd21502c63ae1a943bdb22"), "c" : "d" } { "_id" : ObjectId("5afd2ac32c63ae1a943bdb26"), "c" : "d" }
drop
直接删除整个表数据,速度快
db.test.drop()