Condition to be true for any row in the additionalFields Table to be used.
Remarks
This Assumes the following View is set up:
CREATE VIEW AdditionalFieldSearch AS
SELECT
AdditionalFieldValue.ParentTableID,
AdditionalFieldValue.Value,
AdditionalField.ParentTable,
AdditionalField.FieldName,
FROM
AdditionalField LEFT JOIN
AdditionalFieldValue ON AdditionalFieldValue.AdditionalFieldID = AdditionalField.ID
GO