Select Setup|Validations to display the Validations screen. Validations are used on Reports to test for example input parameter values.
To edit a validation, select the edit link of the validation. When done editing the validation select the Save button.
To add a validation, select the Add button. The details sections requires that the query return only one row with two columns called, Code and Message. The parameters added must have an '@' sign infront of it and as many as required can be added. Select the Save button to complete the validation created.
The validation can be tested from the Validations screen by selecting the Run () icon. The outcome will have one row with two columns called Code and Message.
To delete a validation, select the delete () icon. A prompt will appear to confirm the action and selecting OK will delete the validation.