Modify Join Operators (Visual Database Tools)
Applies to: 
SQL Server
By default, the Query and View Designer joins tables using an equal sign (an equijoin), which matches values in the two join columns. If you want, you can change the operator used to compare values in the join columns.
To modify join operators
In the Diagram pane, right-click the join line you want to modify, and then choose Properties from the shortcut menu.
In the Property window, click Join Condition and Type and click the ellipses (...) to the right of the property.
In the Join dialog box, select a new operator.
See Also
Join Tables Automatically (Visual Database Tools)
Join Tables Manually (Visual Database Tools)
Query with Joins (Visual Database Tools)