MongoDB InsertData

From mi-linux
Jump to navigationJump to search

Main Page >> MongoDB >>MongoDB Workbook >> Insert Data

Inserting data

The format for the INSERT command is:

 db.collectionName.insert( 
  {
    key_1: 'value1',
    key_n: valueN
  }
 )

Note:

  • character and date values must be enclosed in matching single (') or double quotes (").
  • numeric values do not need quotes.
  • key/value pairs are comma-separated (no comma needed after the last pair)
  • each record is enclosed in curly brackets: {}

Department 10

The following examples will create a dept collection that will represent the DEPT table seen in the Oracle Sample Data. We will also include an object id (_id) for each record.

Add department 10:

db.dept.insert(
{
   _id: 10,
   deptno: 10,
   dname:  "ACCOUNTING",
   loc:    "NEW YORK"
})

Assuming you have no error messages, the system should respond with:

 WriteResult({ "nInserted" : 1 })

Department 20

Next add department 20:

db.dept.insert(
{
   _id: 20,
   deptno: 20,
   dname:  "RESEARCH",
   loc:    "DALLAS"

})

Department 40

Next department 40:

db.dept.insert(
{
   _id: 40,
   deptno: 40,
   dname:  "OPERATIONS",
   loc:    "BOSTON"

})

Things to note

If you are getting errors, check carefully that:

  • every opening bracket has an appropriate closing bracket:
    • the insert statement uses round brackets: ()
    • a collection uses curly brackets: {}
  • each key:value pair are separated by commas, except for the last item
  • strings are enclosed in single or double quotes, e.g., 'myString', or "myString"

Exercise 2.1

  • Compare how you added the above data and how it differs from INSERT records in a relational database
  • Try and add Department 30

Next Step

Querying the collection