4. Understanding the Elements of SQL Statements : SQL Functions : Universal Unique Identifier (UUID) : UUID Format
 
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UUID Format
The format of 128-bits (16 octets) UUID is:
Field
Data Type
Octet Number
Note
time_low
unsigned 32-bit integer
0-3
The low field of the timestamp
time_mid
unsigned 16-bit integer
4-5
Time middle field of the timestamp
time_hi_and_version
unsigned 16-bit integer
6-7
The high field of the timestamp multiplex with the release number
clock_seq_hi_and_reserved
unsigned 8-bit integer
8
The high field of the clock sequence multiplex with the variant
clock_seq_low
unsigned 8-bit integer
9
The low field of the clock sequence
node
unsigned 48-bit integer
10-15
The spatially unique node identifier