Are you using Query Browser or Native (SQL)?
Metabase will automatically check the data is receives, and if the format looks like a date-period, then time series are used for the x-axis.
You can change the axis from Timeseries to Ordinal in Visualization Settings > Axes > X-axis scale.
as you can see in the picture, I’ve already changed it to Ordinal.
and I’ve tested both query builder and native query.
@balibaba Hmm, it seems like it’s a bit excessive. I’ve created an issue on it: