Only basic use of mongodb is documented here, as learning to walk is a prerequisite for running, and clicking on this article means you happen to be a beginner
I- Connects to the mongodb server
Run win+r to open CMD or Shift + right-click the shell window
Run mongod –dbpath databaseURL to start the mongodb service
Execute mongo to connect to the database
Show DBS Displays databases in the current service
Use dbName To switch to a specified database
Show Collections looks at the tables available in the current database
Use chartName Switches to a specified table. If the table does not exist, create a table with Inser, insertOne, or insertMany. The database instance DB is returned after the table is created successfully
< note :mongodb provides multiple similar commands for each operation, but I feel like mastering one of them is enough. >
II- Add (insert)
Db.chartname. insert(json) Inserts one or more pieces of data into the specified table, or accepts an array of objects if multiple
Example:
db.user.insert({
name:”zs”
}) // Insert a row into the user table containing the name field zs
III – removed
Db.chartname. remove(json) // Deletes one or more data in the specified table
Example:
db.chartName.remove({
name:’zs’
} // select * from user where name = zs
IIII – modify
Db.chartname. update(json1,{set:json2}) // Find a row in the table and update it, where json1 is the filter, **set is the update identifier, and json2 is the specified update field
Example:
db.user.update(
{name:’zs’},
{$set:{
name:’ls’
}}
} // select * from user where name = zs
| | | – check
Db.chartname. find(json) // Query the data in the user table according to the given filter criteria
Example:
db.user.find({
name:”ls”
}) // select * from user where name=ls
With that said, basic curd operations are covered, and for more advanced usage, please refer to my next article