Search notes:

Power Query M formula language standard library: Diagnostics.ActivityId

Diagnostics.ActivityId() returns a UUID (or GUID) that is unique for the currently-running evaluation. An expression that is evaluated with Expression.Evaluate() is considered to be executed in the same evaluation as its parent. Thus, in the following example guid, same_guid and evaluated_guid all evaluate to the same value: 
[
   guid           =                      Diagnostics.ActivityId()           ,
   same_guid      =                      Diagnostics.ActivityId()           ,
   evaluated_guid = Expression.Evaluate("Diagnostics.ActivityId()", #shared)
]
Github repository about-Power-Query-Formula-M, path: /standard-library/Diagnostics/ActivityId/eval.M

See also

The Power Query standard library

Index

Fatal error: Uncaught PDOException: SQLSTATE[HY000]: General error: 8 attempt to write a readonly database in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php:78 Stack trace: #0 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(78): PDOStatement->execute(Array) #1 /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php(30): insert_webrequest_('/notes/Microsof...', 1788457524, '216.73.217.21', 'Mozilla/5.0 App...', NULL) #2 /home/httpd/vhosts/renenyffenegger.ch/httpsdocs/notes/Microsoft/Power-Query/M-formula/standard-library/Diagnostics/ActivityId/index(48): insert_webrequest() #3 {main} thrown in /home/httpd/vhosts/renenyffenegger.ch/php/web-request-database.php on line 78