Install MongoDB
https://www.mongodb.com/download-center#community
Click the msi installer to install, you can customize the installation, select the installation location, I chose the D drive
Create a data\db directory in the root directory of the D drive to store data; create a data\dbConf\mongodb.log file to store MongoDB logs
Double click to run MongoDB server
Run the MongoDB server as a Windows service
Execute the following command to run the MongoDB server as a Windows service:
mongod.exe --bind_ip 127.0.0.1 --logpath "D:\data\dbConf\mongodb.log" --logappend --dbpath "D:\data\db" --port 27017 --serviceName "MyServiceName" --serviceDisplayName "MyServiceName" --install
The following table describes the parameters of mongodb startup:
| parameter |
describe |
| --bind_ip |
Bind the service IP . If you bind to 127.0.0.1 , you can only access it locally. Do not specify all the default local IPs . |
| --logpath |
Specify the MongoDB log file, note that the specified file is not a directory |
| --logappend |
write log using append |
| --dbpath |
Specify the database path |
| --port |
Specify the service port number, the default port is 27017 |
| --serviceName |
Specify service name |
| --serviceDisplayName |
Specify the service name, executed when there are multiple mongodb services. |
| --install |
Specifies to install as a Windows service. |
Installation of MongDB graphical tool ( Robomong )
http://www.softpedia.com/get/Internet/Servers/Database-Utils/Robomongo.shtml#download
Click Next to install
Simple and practical use of MongDB
Double click mongo.exe
1. Create a database
use DataBase_Name
If the database does not exist, create the database, otherwise switch to the specified database
2. View the database
show dbs
3. Insert the data document ( the set will be inserted directly, without the set, it will be created automatically )
db.name of collection.insert ({
name:' Zhang San ',
age:27
}
)
Eg:
4. Update documentation
db.collectionname.update ( _
{'name':' Zhang San '} , {$set:{'name':'lisi'}}
)
5. Inquiry
db.name of collection.find ()
6. Delete
Delete the collection named Zhangsan
db.col.remove({'name':' Zhang San '})
delete the first found record
db.name of collection.remove ( DELETION_CRITERIA,1)
delete all data
db.name of collection.remove ({})
6. Conditional query
db.name of collection.find ({likes:{$gte:100}})
similar
select * from col where likes>=100
less than ---$lt
Less than or equal to ----$lte
Explicit range query greater than 100 less than 200
db.name of collection.find ({likes:{$lt:100 ,$gt:100}})
7.limit query
db.COLLECTION_NAME.find().limit(NUMBER)
db.collection name.find({},{"title":1,_id:0}).limit(2)
8. Sort ( 1 ascending -1 descending)
db.setname.find().sort({KEY:1})
Comparison between MongoDB syntax and existing relational database SQL syntax
MongoDB syntax MySql syntax
db.test.find({'name':'foobar'})<==> select * from test where name='foobar'
db.test.find() <==> select *from test
db.test.find({'ID':10}).count()<==> select count(*) from test where ID=10
db.test.find().skip(10).limit(20)<==> select * from test limit 10,20
db.test.find({'ID':{$in:[25,35,45]}})<==> select * from test where ID in (25,35,45)
db.test.find().sort({'ID':-1}) <==> select * from test order by IDdesc
db.test.distinct('name',{'ID':{$lt:20}}) <==> select distinct(name) from testwhere ID<20
db.test.group({key:{'name':true},cond:{'name':'foo'},reduce:function(obj,prev){prev.msum+=obj.marks;},initial:{msum:0}}) <==> select name,sum(marks) from testgroup by name
db.test.find('this.ID<20',{name:1}) <==> select name from test whereID<20
db.test.insert({'name':'foobar','age':25})<==>insertinto test ('name','age') values('foobar',25)
db.test.remove({}) <==> delete * from test
db.test.remove({'age':20}) <==> delete test where age=20
db.test.remove({'age':{$lt:20}}) <==> elete test where age<20
db.test.remove({'age':{$lte:20}}) <==> delete test where age<=20
db.test.remove({'age':{$gt:20}}) <==> delete test where age>20
db.test.remove({'age':{$gte:20}})<==> delete test where age>=20
db.test.remove({'age':{$ne:20}}) <==> delete test where age!=20
db.test.update({'name':'foobar'},{$set:{'age':36}})<==> update test set age=36 where name='foobar'
db.test.update({'name':'foobar'},{$inc:{'age':3}})<==> update test set age=age+3 where name='foobar'
Fuzzy query: $regex
db.test.find({"name":{$regex:"aaa"}})
MongoDB index related
Check out the index:
db.getCollection('id_mapper').getIndexes()
Create index: 1 means create the index in ascending order, -1 means create the index in descending order
db.getCollection('id_mapper').ensureIndex({"contract_id":1},{background: true})
Note: If you create an index for a document with existing data, you can set the background value to true , so that MongoDB creates the index in the background, so that other operations will not be blocked during creation. In contrast, creating an index in a blocking way makes the entire creation process more efficient, but MongoDB will not be able to receive other operations during creation.
The default index name is: contract_id_1
Create a composite unique index:
db.getCollection('id_mapper').ensureIndex({"apply_id":1,"insti_code":1},{"background":true},{"unique":true})
Delete an index: Before deleting, be sure to see what the index name is
db.getCollection('id_mapper').dropIndex("contract_id_1")
db.getCollection('id_mapper').dropIndexes() deletes all indexes
Double field query:
db.getCollection('id_mapper').find({"contract_id":"767862ce-0ca9-4673-92e5-c505d7d3686c"},{"insti_code":"1"})
There is a field with an index on the line
After the index is created, the newly added Document through the program will automatically add the index, which has been verified