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mongodb增删改查 


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1.插入
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use tblorders;

--方法1
db.tblorders.insert( { orderno: "A2014089901", pname: "tblorders", scity:"beijing" } );
db.tblorders.insert( { orderno: "A2014089902", pname: "snow", scity:"成都" } );
db.tblorders.insert( { orderno: "A2014089903", pname: "kiki", scity:"重庆" } );

db.tblorders.find();

--方法2
db.tblorders.save({orderno: "A2014089904", pname: "atalas", scity:"乌鲁木齐",sdate: "2015-08-08"} );



--方法3
for (var i = 1; i <= 300; i++) db.tblorders.save({id: i, name: 'ocpyang'});


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2.更新
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---方法:set
将所有ocpyang更新为Atalas

db.tblorders.update({ name: "ocpyang" }, { $set: {name: "Atalas"} },false,true) ;


---方法:$inc
$inc

用法：{ $inc : { field : value } }

意思对一个数字字段field增加value，例：
db.tblorders.insert( { orderno: "10001", pname: "ocpyang", scity:"重庆",price:1500 } );

db.tblorders.find({"pname":"ocpyang"}).forEach(printjson);
{
	"_id" : ObjectId("55bf126b4726e2d2dc5f43cd"),
	"orderno" : "10001",
	"pname" : "ocpyang",
	"scity" : "重庆",
	"price" : 1500
}

db.tblorders.update( { "orderno": "10001" } , { $inc : { "price" : 130 } } );

db.tblorders.find({"pname":"ocpyang"}).forEach(printjson);
{
	"_id" : ObjectId("55bf126b4726e2d2dc5f43cd"),
	"orderno" : "10001",
	"pname" : "ocpyang",
	"scity" : "重庆",
	"price" : 1630
}





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3.删除
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$unset

用法：{ $unset : { field : 1} }


--1.满足条件的一行
db.tblorders.update({ "id": 1 }, { $unset: {"naje" : 1} }) ;


--2.满足条件的所有行
db.tblorders.update({ "name": "Atalas" }, { $unset: {"name" : 1}},false,true) ;


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4.查询
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db.tblorders.insert( { orderno: "10001", pname: "ocpyang", scity:"重庆",price:1500 } );
db.tblorders.insert( { orderno: "10005", pname: "luces", scity:"天津",price:1280 } );
db.tblorders.insert( { orderno: "10010", pname: "刘德华", scity:"上海浦东",ecity:"休斯顿",price:9850 } );

--方法1
db.tblorders.find();

--方法2
db.tblorders.find({"pname" : "kiki"});

--方法3
db.tblorders.find({"pname" : "kiki"}).limit(1);

--方法4
db.tblorders.find({"pname" : "kiki"}).forEach(printjson);


db.tblorders.find({"pname": "刘德华"}).forEach(printjson);

--方法5：大于、大于等于、小于、小于等于、between
db.tblorders.find({"price":{$gt: 1500}}).forEach(printjson);

db.tblorders.find({"price":{$gte: 1500}}).forEach(printjson);

db.tblorders.find({"price":{$lt: 1500}}).forEach(printjson);

db.tblorders.find({"price":{$lte: 1500}}).forEach(printjson);

--大于1700小于10000
db.tblorders.find({"price":{$gt: 1700,$lt : 10000}}).forEach(printjson);



--方法6:不等于
db.tblorders.find({"price":{$ne: 1630}}).forEach(printjson);

eg:大于1300小于10000不等于1630
db.tblorders.find({"price":{$ne: 1630,$gt: 1300,$lt : 10000}}).forEach(printjson);


--方法7:in

db.tblorders.find({"price" : {$gt : 1000}}).forEach(printjson);
{
	"_id" : ObjectId("55bf126b4726e2d2dc5f43cd"),
	"orderno" : "10001",
	"pname" : "ocpyang",
	"scity" : "重庆",
	"price" : 1630
}
{
	"_id" : ObjectId("55bf15bd4726e2d2dc5f43ce"),
	"orderno" : "10001",
	"pname" : "ocpyang",
	"scity" : "重庆",
	"price" : 1500
}
{
	"_id" : ObjectId("55bf15bd4726e2d2dc5f43cf"),
	"orderno" : "10005",
	"pname" : "luces",
	"scity" : "天津",
	"price" : 1280
}
{
	"_id" : ObjectId("55bf15be4726e2d2dc5f43d0"),
	"orderno" : "10010",
	"pname" : "刘德华",
	"scity" : "上海浦东",
	"ecity" : "休斯顿",
	"price" : 9850
}





db.tblorders.find({"price" : {$in : [1280,1500]}}).forEach(printjson);
{
	"_id" : ObjectId("55bf15bd4726e2d2dc5f43ce"),
	"orderno" : "10001",
	"pname" : "ocpyang",
	"scity" : "重庆",
	"price" : 1500
}
{
	"_id" : ObjectId("55bf15bd4726e2d2dc5f43cf"),
	"orderno" : "10005",
	"pname" : "luces",
	"scity" : "天津",
	"price" : 1280
}


--方法8:not in

db.tblorders.find({"price" : {$nin : [1280,1500],$gt : 1000}}).forEach(printjson);
{
	"_id" : ObjectId("55bf126b4726e2d2dc5f43cd"),
	"orderno" : "10001",
	"pname" : "ocpyang",
	"scity" : "重庆",
	"price" : 1630
}
{
	"_id" : ObjectId("55bf15be4726e2d2dc5f43d0"),
	"orderno" : "10010",
	"pname" : "刘德华",
	"scity" : "上海浦东",
	"ecity" : "休斯顿",
	"price" : 9850
}



--方法9:skip限制返回记录的起点

db.tblorders.find().skip(2).limit(5);  #从第3条开始返回5条


--方法10:sort排序

db.tblorders.find({"price": {$gt: 0}}).sort({price : 1}).forEach(printjson);

db.tblorders.find({"price" : {$gt : 0 }}).sort({price : 1});

db.tblorders.find({"price" : {$gt : 0 }}).sort({price : -1});

--方法11:游标

for( var c = db.tblorders.find({"price" : {$gt : 0 }});c.hasNext();){printjson(c.next());}

db.tblorders.find({"price" : {$gt : 0 }}).forEach(function(u) {printjson(u);});


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5.统计
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db.tblorders.find().count();