MongoDB 用時間篩選_id欄位
阿新 • • 發佈:2019-01-02
下面的程式碼來自stackoverflow,在MongoDB shell中執行
> function objectIdWithTimestamp(timestamp) { // Convert string date to Date object (otherwise assume timestamp is a date) if (typeof(timestamp) == 'string') { timestamp = new Date(timestamp); } // Convert date object to hex seconds since Unix epoch var hexSeconds = Math.floor(timestamp/1000).toString(16); // Create an ObjectId with that hex timestamp var constructedObjectId = ObjectId(hexSeconds + "0000000000000000"); return constructedObjectId } > db.digital_message.find({ _id: { $lt: objectIdWithTimestamp('2015/10/01') } }).count() 7792766 > db.digital_message.count() 7959508