It is possible to virtually join data tables.
A virtual join links a main data table to one or more auxiliary data tables, allowing the main data table to access data from the auxiliary data tables without having to physically join the tables.
Virtually joining tables saves memory because the same data does not need to be duplicated between tables. It also makes updating linked data simpler: linked data can be updated separately in each source table, without the need to update the referencing data table every time the data in the referenced table is updated.
For more information about virtually joining data tables, see "Virtually Joining Data Tables" in the JMP online help "Using JMP."
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