Job Entry Date and Department Entry Date Equivalents in OTBI

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Wondering if anyone has identified a way to access job entry date and department entry date in fusion hcm.

These were delivered calculated fields in People Soft, but I have been unable to replicate in OTBI without using a somewhat messy logical sql.

Job Entry Date would typically be the minimum effective start date from the assignment record where the job code equals the current job code for that assignment.   However, it gets a little tricky if a person has switched jobs and returned to a job code with a different job code in between.  In instances such as these, the job entry date would be the minimum effective start date for that job code where the job code has been concurrent.  So in the example below, I would want to return a "Job Entry Date" of 1/1/2008 (Not 1/1/2000).