插入数据
db.c_cons.insert({
_id : 1574824688,
name : "李大爷",
addr : "狗蛋村",
mpId : 10558463215,
status : 0
});
db.c_cons.insert({
_id : 1574824689,
name : "邹老湿",
addr : "狗蛋村",
mpId : 10558463225,
status : 0
});
db.c_cons.insert({
_id : 1574824690,
name : "邹老湿",
addr : "丫蛋村",
mpId : 10558463125,
status : 9
});
更新数据
db.collection.update(
,
,
{
upsert: ,
multi: ,
writeConcern:
}
)
- upsert、multi为可选属性，默认为false
- upsert=true时，通过
未匹配到数据，则会插入一条新数据 - multi=true时，通过
匹配到多条数据时会批量更新
默认
db.c_cons.update({'name':'邹老湿'},
{$set:{'status':9}},
{upsert:false,multi:false});
multi=true
执行前
> db.c_cons.find() });
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824689, "name" : "邹老湿", "addr" : "狗蛋村", "mpId" : 10558463225, "status" : 9 }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 9 }
执行后
> db.c_cons.update({'name':'邹老湿'},
... {$set:{'status':0}},
... {upsert:false,multi:true});
WriteResult({ "nMatched" : 2, "nUpserted" : 0, "nModified" : 2 })
> db.c_cons.find() });
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824689, "name" : "邹老湿", "addr" : "狗蛋村", "mpId" : 10558463225, "status" : 0 }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
upsert=true
> db.c_cons.update({'name':'邹老湿2'},
... {$set:{'status':0}},
... {upsert:true,multi:false});
WriteResult({
"nMatched" : 0,
"nUpserted" : 1,
"nModified" : 0,
"_id" : ObjectId("596c88cb2e6bd83e8998188e")
})
> db.c_cons.find() });
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824689, "name" : "邹老湿", "addr" : "狗蛋村", "mpId" : 10558463225, "status" : 0 }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
{ "_id" : ObjectId("596c88cb2e6bd83e8998188e"), "name" : "邹老湿2", "status" : 0 }
save方法
- save会根据id替换所有document
> db.c_cons.save({
... "_id" : 1574824689,
... "name" : "zhoulaoshi"
... });
WriteResult({ "nMatched" : 1, "nUpserted" : 0, "nModified" : 1 })
> db.c_cons.find()
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824689, "name" : "zhoulaoshi" }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
{ "_id" : ObjectId("596c88cb2e6bd83e8998188e"), "name" : "邹老湿2", "status" : 0 }
- 输入不存在的id会自动插入
> db.c_cons.save({ "_id" : 1574824189, "name" : "zhoulaoshi" });
WriteResult({ "nMatched" : 0, "nUpserted" : 1, "nModified" : 0, "_id" : 1574824189 })
> db.c_cons.find()
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824689, "name" : "zhoulaoshi" }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
{ "_id" : ObjectId("596c88cb2e6bd83e8998188e"), "name" : "邹老湿2", "status" : 0 }
{ "_id" : 1574824189, "name" : "zhoulaoshi" }
删除文档
> db.c_cons.find()
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824689, "name" : "zhoulaoshi" }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
{ "_id" : ObjectId("596c88cb2e6bd83e8998188e"), "name" : "邹老湿2", "status" : 0 }
{ "_id" : 1574824189, "name" : "zhoulaoshi" }
{ "_id" : ObjectId("596c8a4e5b45b2e28c94270d"), "name" : "zhoulaoshi" }
> db.c_cons.remove(
... {'name':'zhoulaoshi'},
... {justOne:true})
WriteResult({ "nRemoved" : 1 })
> db.c_cons.find();
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
{ "_id" : ObjectId("596c88cb2e6bd83e8998188e"), "name" : "邹老湿2", "status" : 0 }
{ "_id" : 1574824189, "name" : "zhoulaoshi" }
{ "_id" : ObjectId("596c8a4e5b45b2e28c94270d"), "name" : "zhoulaoshi" }
- justOne默认false删除所有匹配项
> db.c_cons.remove( {'name':'zhoulaoshi'})
WriteResult({ "nRemoved" : 2 })
> db.c_cons.find();
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
{ "_id" : ObjectId("596c88cb2e6bd83e8998188e"), "name" : "邹老湿2", "status" : 0 }
- 删除所有数据
db.col.remove({})
查询文档
db.collection.find(query, projection)
- projection作用是过滤显示的字段，默认省略，即显示全部字段
- query 可选，查询条件，相当于sql中的where子句
条件语句查询
| 条件 | 格式 | 实例 |
|---|---|---|
| 等于 | { |
db.c_cons.find({"name":"李大爷"}) |
| 小于 | { |
db.c_cons.find({"mpId":{$lt:10558463200}}) |
| 小于或等于 | { |
db.c_cons.find({"mpId":{$lte:10558463200}}) |
| 大于 | { |
db.c_cons.find({"mpId":{$gt:10558463200}}) |
| 大于或等于 | { |
db.c_cons.find({"mpId":{$gte:10558463200}}) |
AND查询
- db.col.find({key1:value1, key2:value2})
> db.c_cons.find({"name":"李大爷"}))))
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824698, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463211, "status" : 0 }
> db.c_cons.find({"name":"李大爷","mpId":10558463211})
{ "_id" : 1574824698, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463211, "status" : 0 }
OR查询
db.col.find(
{
$or: [
{key1: value1}, {key2:value2}
]
}
)
> db.c_cons.find( { $or:[ {"addr":"丫蛋村"},{"addr":"隔壁"} ] } )
{ "_id" : 1574824690, "name" : "邹老湿", "addr" : "丫蛋村", "mpId" : 10558463125, "status" : 0 }
{ "_id" : 1574824699, "name" : "老王", "addr" : "隔壁", "mpId" : 10558463211, "status" : 0 }
AND和OR联合使用
> db.c_cons.find({
"name":"老王",
$or:[{"addr":"狗蛋村"},{"addr":"隔壁"}]
})
{ "_id" : 1574824699, "name" : "老王", "addr" : "隔壁", "mpId" : 10558463211, "status" : 0 }
> db.c_cons.find({
... $or:[{"name":"老王"},{"status":9}],
... $or:[{"addr":"狗蛋村"},{"addr":"隔壁"}]
... })
{ "_id" : 1574824688, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463215, "status" : 0 }
{ "_id" : 1574824698, "name" : "李大爷", "addr" : "狗蛋村", "mpId" : 10558463211, "status" : 0 }
{ "_id" : 1574824699, "name" : "老王", "addr" : "隔壁", "mpId" : 10558463211, "status" : 0 }
$type操作
db.col.find({"title" : {$type : 2}})
- 使用$type可以限制字段的格式
- $type值如下
| 类型 | 值 |
|---|---|
| Double | 1 |
| String | 2 |
| Object | 3 |
| Array | 4 |
| Binary data | 5 |
| Object id | 7 |
| Boolean | 8 |
| Date | 9 |
| Null | 10 |
| Regular Expression | 11 |
| JavaScript | 12 |
| Symbol | 13 |
| 32-bit Integer | 16 |
| TimeStamp | 17 |
| 64-bit Integer | 18 |
| Min-key | 255 |
| Max-key | 127 |