Lookup tables improve the speed of query execution by performing an often-used pattern of query processing with a single access to the database.
The main Lookup Tables dialog box displays the following information for any previously-defined lookup tables.
From the main Lookup Tables dialog box, you can click Add to add a new lookup table, click Edit to edit information on an existing lookup table, or click Delete to delete a lookup table. To use your lookup table, create a Lookup Variable.