I'm new at Tableau and am beginning to build my first viz from a master population file of 18M records (4GB+) with several much smaller files that add dimensional data. All sources are .csv files.
Because of the file size, I am doing a full import of the master population file which then causes me to be using the extract. However, when I then define a join to one of the supplemental tables, I get a message that an extract is active and I can't see the dimensions of the joined table in the data pane unless I switch off extract mode. What am I doing wrong?
Tableau can't join CSV files that are larger than 4GB in size.
You can load the primary table and then use data blending to blend your dimensional tables on to your primary table.