I want to create a vertical bar chart visualisation where I count the number of events depending to event timestamp, and I notice a behavior that does not understand.
My event time field is called ACT_HEURE_ACTIVITE.
My time dimension spreads from 2th of may 00:00:00 to 3th of may 00:00:00.
When I set my Y-axis agregation to Count Kibana returns 102 ivents. Same if I change to Unique count using INC_ID field (which is a unique ID).
When I let my Y-axis agregation to Count mode and set my X-axis to Date Histogram using ACT_HEURE_ACTIVITE and daily interval, Kibana still returns 102 events.
But when I change my Y-axis agregation to Unique Count using INC_ID field the system returns 100 events...
And I change the Y-axis field to ACT_HEURE_ACTIVITE Kibana returns 103 events !
Could anyone explain this behaviour?