This field is used when Display_As is set to relationship. It is optional. It can be used to designate a portion of a select statement (equivalent to one column) that will be used as the text displayed in the Source and Target choice boxes. By default, if you leave it blank, this defaults to:<br>
Table1.Name<br>
<br>
where "Table1" is the first table referenced in the relationship table name. For example, if the rel table is "REL_Products__Categories", then "Products.Name" would be the default for this field if it is left blank. The table name MUST be included for this to work, and the text must return one column.<br><br>
You can use concat to combine date from more than one field, like:<br>
CONCAT(Customers.First_Name,' ',Customers.Last_Name)