I haven’t had to do data research for a while, so I can’t tell you how long this hasn’t been working, but it is NOT a problem in the GA version.
I just now ran a query in the editor that returned duplicate data in a table with 251 columns (in case that is relevant). The query returns all the columns. When I select the first two records on the data grid, left click on the column selector and then right-click to select “Uncheck columns with matching data”, most of the duplicate columns disappear, but there are a few that remain.
Some have nulls in them and some have text values that come from pick lists, so I know they really truly are the same with no hidden spaces or special characters. Most of the columns that remained that should have been unchecked are at the beginning of the table, but I can’t see any pattern about why they would have remained checked.
Fortunately, it removed enough columns that I was able to find the problem, but it would be super nice if we could have that option hide all the columns with duplicate data.
Digital Products & Strategies, Cru | Data Sciences & Analytics