MongoDB Learning Summary (i)

About the default settings for the MOGODB database:

1. The port default setting is: 270172. The database file location defaults to: c:/data/db, it is recommended to modify to a different disk location, you must create the Data/db folder at the root of the disk the default logging mode of the 3.MONGODB database is overridden to overwrite the way, We recommend that you write the log by using the Append method: Mongod--logpath "D:/data/log/mongodb.log"--logappend

MONGO Shell Operation command: 1. Connect to MongoDB Database

MONGO--host hostname/ip--port 27017 [DatabaseName] Example: MONGO--host 172.0.0.1--port 27017 Mydbs

2. Collection Operations

Db.student.drop ();//delete Student this collection

3. Document operations

Focus: Learn $inc/$set/$unset/$push/$pop/upsert modifier//Insert document Db.student.insert into student collection ({"Name": "Zhangsan"});// The query document uses find ();d b.student.find ();//update id=58d4ccd4126ab1e4ca76aa73 's document, modify or add its name key value to Db.student.update ({"_id": ObjectId ("58d4ccd4126ab1e4ca76aa73")},{"$set": {"name": "Xiaoming"}});//Modify the document using Update () db.student.update ({"Name": "Xiaoming"},{"$set": {"Age": +});d B.student.update ({"Name": "Xiaoming"},{"$set": {"name": "Dragon"}}); Result: {"_id": ObjectId ("58d4ccd4126ab1e4ca76aa73"), "name": "Dragon", "age": 23}//Format Document when querying documents Db.student.find (). Pretty ();                                  {    "_id": ObjectId ("58d4ccd4126ab1e4ca76aa73"),     "name": "Xiaoming",     "age": 23}// Delete Document syntax: Db.collection.remove (condition, {justone: <boolean>,writeconcern: <document>}) query: (optional) The condition of the deleted document. Justone: (optional) If set to TRUE or 1, only one document is deleted. Writeconcern: (optional) the level at which the exception is thrown. Example: Db.student.remove ({"Name": "Dragon"},{"Justone": True, "Writeconcern": true});

4. Conditional operators

$lt (<), $gt (>), $gte (>=), $lte (<=)

5.mongodb Fuzzy Query

Db.student.find ({"name": {"$regex": "zhangsa*", "$options": "I"}});

Result: {"_id": ObjectId ("58d4da0a126ab1e4ca76aa74"), "name": "Zhangsan"}

Db.student.insert ({"Name": "Cheng Long", "age": All, "adress": "Beijing"}); Db.student.find ({name:{$regex: "Into", $options: "I"}});

Result: {"_id": ObjectId ("58d508b109d615ae79c96930"), "name": "Cheng Long", "age": All, "adress": "Beijing"}

MONGO--host 172.0.0.1--port 27017 mydbsdb.student.find ({"name": {$regex: ' Dragon ', $options: ' I '}};d B.test_info.find ({" Tname ": {$regex:/Jackie./i}});

This article is from my Tech blog blog, so be sure to keep this source http://zhufangmin.blog.51cto.com/10913615/1910306

MongoDB Learning Summary (i)