What are some common MongoDB terms?

• Document

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  • Basic unit of data
  • Based on objects represented as JSON
  • Stored in a binary format BSON
  • Can have one or more fields
  • Grouped together as collections
  • Examples ...

• Field

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  • Smallest subdivision within a document
  • Analogous to a column in a database table
  • Examples ...

• Collection

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  • Group of documents
  • Like an RDBMS table
  • Exists within a mongoDB database
  • No fixed/rigid schema: documents can have different fields
  • Collections should represent data with a common purpose
  • Examples ...

• Referencing

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  • Used for 1-to-many relationships
  • More efficient storage
  • Allows for normalized data structures
  • Slower and less efficient to read
  • Examples ...

• Embedding

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  • Lets you to represent 1-to-1 and 1-to-many relationships
  • Allows for de-normalized complex modeling
  • Brings in data where it is needed
  • "Document Growth" can affect writes and risk fragmentation
  • Examples ...

• Cursor

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  • Used to iterate through results of a query
  • Produced by find()
  • Further ops are possible: sort(),limit(),etc.