tttjjj/elt_bench huggingface dataset:
opportunity_id: Foreign key referencing the id of the OPPORTUNITY.
updated_at: Timestamp of when the opportunity was changed to this stage.
stage_id: Foreign key referencing the STAGE that the opportunity was changed to.
updater_id: Foreign key referencing the USER who changed the opportunity stage.
to_stage_index: The index of the stage in the pipeline at the time the stage change occurred.