Ignoring Certain Columns
You can ignore some columns. When you do this, relationships to them do not appear in the model.
To ignore certain columns
1. Run a full indexing scan on the data source resources you want in the model, including the tables with columns that you want to ignore.
2. Create a model.
3. Drag in tables and data sources that you have indexed.
4. Select the Relationships tab for the model.
5. Click From Column(s) in the table header to sort by the from-column names.
6. Find the columns you want to ignore. (They should all be adjacent.) Select them all, and then right-click and select Mark Invalid in the context menu.
7. Repeat the preceding two steps for the To Column(s) header.
8. Go back to the Diagram or Cross Schema Diagram and hide the invalid relationships by selecting the Hide Invalid Relationships toolbar button.
These steps eliminate all relationships involving the ignored column in the model display.
Invalidated columns are invalid across all subsequent models you create. However, if a subsequent model exposes these columns, you need to invalidate the new ones if you do not want to include them.