MongoDB: Introduction

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MongoDB Expressions

SQL	MongoDB
Table	Collection
Row	Document
Column	Field

BSON Object ID

MongoDB Object ID: 5a771edb402dcf1b06a52e57
12 Byte Primarykey

Byte 0-3: Unix Timestamp
Byte 4-6: Machine Identifier
Byte 7-9: Process Identifier (PID)
Byte 10-11: Random Counter

BSON Atomic Data Types

• BSON Object IDs
• String
• Float64 (double)
• Float128
• Boolean
• Date
• Null
• Regex
• JavaScript
• int32
• int64
• Binary
• Timestamp
• Array
• Object

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