In answer to my question,
> When formulating a query, it would sometimes be nice to see all the values
> of a field that exist in the database. Can this be done?
> hide all columns except what you want
> this effectivelly does sort -u om the reamining column
> i.e. lists all possible value as of the part of the database you explored
This is brilliant.
Looks like you have to Switch the column you want into the first column
before you hide the other columns.