-------------------------
document 
-------------------------
	# Êý¾ÝÀàÐÍ
		* mongoÖеÄÊý×Ö, ĬÈÏÊÇ double Êý¾ÝÀàÐÍ, Èç¹ûÐèÒª´æ´¢ÕûÐÎ, ±ØÐëʹÓú¯Êý NumberInt(val)
			db.user.insert({name: "n3", age: NumberInt(27)});
		
		* ²åÈ뵱ǰÈÕÆÚʹÓÃ: new Date();
		* Èç¹û×Ö¶ÎΪ null,  ²»Ó¦¸ÃÉùÃ÷


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document - id
-------------------------
	# ÔÚ¼¯ºÏÖвåÈëÎĵµÊ±£¬Èç¹ûûÓÐÔÚ×Ö¶ÎÃû³ÆÖÐÌí¼Ó´øÓÐ_idµÄ×Ö¶ÎÃû³Æ£¬ÔòMongoDB½«×Ô¶¯Ìí¼ÓÒ»¸öObject id×Ö¶Î
		{"_id": ObjectId("xxxxxxxxx")}
	



-------------------------
document - »ù±¾ÃüÁî
-------------------------
	db.[collection].insert([document], [config]);
		* ÍùÖ¸¶¨µÄcollection²åÈëÒ»¸ö»òÕ߶à¸ö(²ÎÊýÓÃÊý×é)document
		* Èç¹û collection ²»´æÔÚ, »á´´½¨

		* Ö´Ðгɹ¦ºó·µ»Ø²åÈë³É¹¦µÄÎĵµÊýÁ¿
			WriteResult({"nInserted": 1});
		
		* config
			{
				writeConcern: <document>
					* ¿ÉÑ¡£¬Å׳öÒì³£µÄ¼¶±ð¡£
				ordered: true
					* ĬÈÏΪ true, °´ÕÕ˳Ðò²åÈëÎĵµ, Èç¹ûÆäÖÐÈκÎÒ»¸öÒì³£, ÔòÁ¢¼´·µ»Ø, Ê£ÓàµÄÎĵµ²»»á´¦Àí
					* Èç¹ûΪ false, Èç¹û²åÈëÎĵµÒì³£, Ìø¹ý²»»á·µ»Ø, ¼ÌÐø´¦ÀíºóÃæµÄÎĵµ
			}
			
	db.[collection].remove([condition], [config]);
		* ¸ù¾ÝÌõ¼þÒƳýÊý¾Ý
		* Èç¹ûûÓÐÌõ¼þ, ÔòÒƳýËùÓÐÊý¾Ý
		
		* config
			{
				justOne: false,
					* Èç¹ûÉèΪ true »ò 1£¬Ôòֻɾ³ýÒ»¸öÎĵµ
					* Èç¹û²»ÉèÖøòÎÊý£¬»òʹÓÃĬÈÏÖµ false£¬Ôòɾ³ýËùÓÐÆ¥ÅäÌõ¼þµÄÎĵµ¡£
				writeConcern: <document>
					* ¿ÉÑ¡£¬Å׳öÒì³£µÄ¼¶±ð¡£
			}
		
-------------------------
document - ¸üÐÂ
-------------------------
	db.[collection].update([condition], [update], [config]);
		* ¸ù¾Ý condition Ö´ÐÐ update ÐÞ¸ÄÒ»ÌõÎĵµ
			db.users.update({name: "KevinBlandy"}, {$set: {name: "new Name"}}); // UPDATE `users` SET `name` = 'new Name' WHERE `name` = 'KevinBlandy';
		
		* Èç¹û²»Ê¹Óà $Set, Ö¸ÁîÀ´¶ÔÖ¸¶¨µÄ×ֶνøÐÐÐÞ¸Ä, ÄÇô¾Í»á±ä³É¸²¸ÇÐÞ¸Ä, ʹÓÃÐÂÎĵµ³¹µ×¸²¸Ç¾ÉÎĵµ
			db.users.update({name: "KevinBlandy"}, {name: "ff"}); // °Ñname=KevinBlandyµÄÎĵµ£¬Ð޸ijÉÖ»ÓÐ name=ffµÄÎĵµ
		

		* config Ñ¡Ïî
			{
				upsert: true,
					*  ¿ÉÑ¡£¬Èç¹û²»´æÔÚupdateµÄ¼Ç¼£¬ÊÇ·ñ²åÈëobjNew ,trueΪ²åÈ룬ĬÈÏÊÇfalse£¬²»²åÈë¡£
				multi: true,
					* ¿ÉÑ¡£¬Ä¬ÈÏÊÇfalse,Ö»¸üÐÂÕÒµ½µÄµÚÒ»Ìõ¼Ç¼£¬Èç¹ûÕâ¸ö²ÎÊýΪtrue,¾Í°Ñ°´Ìõ¼þ²é³öÀ´¶àÌõ¼Ç¼ȫ²¿¸üС£
				writeConcern: <document>
					* ¿ÉÑ¡£¬Å׳öÒì³£µÄ¼¶±ð¡£
				collation: <document>,
				arrayFilters: [<filder-document>],
				hint: <document|string>
			}
	
	db.[collection].save([document], [config]);
		* ¸²¸ÇÐÞ¸Ä, ͨ¹ý´«ÈëµÄÎĵµÀ´Ìæ»»ÒÑÓÐÎĵµ
		* config Ñ¡Ïî
			{
				writeConcern: <document>
					* ¿ÉÑ¡£¬Å׳öÒì³£µÄ¼¶±ð¡£ 
			}
		
	
	
	# ¸üÐÂÏà¹ØµÄÖ¸Áî
		$set
			* ÉèÖÃÖµ
			* Èç¹û $set µÄ×ֶβ»´æÔÚ, »áд´½¨
		
		$inc (Ô­×ÓÃüÁî)
			* ×ÔÔö×Ö¶ÎÖµ
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$inc: {age: 1}}); // ¶Ôage×ֶΠ+1
			
		$unset (Ô­×ÓÃüÁî)
			* Óû§É¾³ýÖ¸¶¨µÄ×Ö¶Î
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$unset: {age: 1}}) // ɾ³ýage×Ö¶Î

		$push
			* Ìí¼ÓÒ»¸öÔªËص½Êý×éβ²¿
			* Èç¹ûfield²»´æÔÚ£¬»á×Ô¶¯²åÈëÒ»¸öÊý×éÀàÐÍ
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$push: {skills: "ruby"}}) // Ìí¼Ó ruby µ½¶ÔÏóµÄ skills ¼¯ºÏÖÐ
			* ÔªËØ¿ÉÒÔÊÇÈÎÒâÊý¾ÝÀàÐÍ

		$pushAll
			* Ìí¼Ó¶à¸ö¶ÔÏóµ½Êý×éβ²¿
			* ²ÎÊýÊÇÒ»¸öÊý×é
			

		$pop
			* ´ÓÊý×éÖÐɾ³ýÔªËØ
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$pop: {skills: -1}}); // ɾ³ý skills ÖеĵÚÒ»¸öÖµ
			* ɾ³ýλÖõÄÖµ
				-1: µÚÒ»¸ö
				 1: ×îºóÒ»¸ö

		$pull (Ô­×ÓÃüÁî)
			* ´ÓÊý×éɾ³ýµÚÒ»¸öÆ¥Åäµ½µÄÖµ
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$pull: {skills: "java"}}); // ɾ³ý skills ÖÐµÄ java ÔªËØ

		$pullAll (Ô­×ÓÃüÁî)
			* ´ÓÊý×éɾ³ý¶à¸öÆ¥Åäµ½µÄÖµ
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$pull: {skills: ["java", "python"]}}); // ɾ³ý skills ÖÐµÄ java, python ÔªËØ

		$addToSet (Ô­×ÓÃüÁî)
			* ¼ÓÒ»¸öÖµµ½Êý×éÄÚ£¬¶øÇÒÖ»Óе±Õâ¸öÖµÔÚÊý×éÖв»´æÔÚʱ²ÅÔö¼Ó
			* Èç¹û²ÎÊýÊǶÔÏó, »òÕßÊý×é, ÄÇô»á½øÐÐÉî±È½Ï
		
		$rename (Ô­×ÓÃüÁî)
			* ¶Ô×ֶνøÐÐÖØÃüÃû
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$pull: {skills: "_skills"}});  // °Ñ skills ÊôÐÔÐÞ¸ÄΪ _skills
		
		$bit (Ô­×ÓÃüÁî)
			* λ²Ù×÷£¬integerÀàÐÍ
				db.user.update({_id: ObjectId("5eba69c51e2bb3537a710e0b")}, {$bit: {val: {and: NumberInt(5)}}}); // UPDATE `val` SET `val` = (`val` and 5)
			
			* λÒƲÙ×÷:and,or,not.....