Relationship to the MeasurePoint table, used to check if a MeasurePoint with the same assetnum, metername and siteid already exists. The WHERE clause is: measurepoint.assetnum = measurepoint.assetnum and measureppoint.metername = measurepoint.metername and measurepoint.siteid = measurepoint.siteid. The resulting set will contain zero or one object.
Razmerje do tabele MeasurePoint, ki se uporablja za preverjanje, ali že obstaja merilna točka MeasurePoint z enako številko sredstva assetnum, imenom merila metername in ID-jem enote siteid. Člen WHERE je: measurepoint.assetnum = measurepoint.assetnum and measureppoint.metername = measurepoint.metername and measurepoint.siteid = measurepoint.siteid. Nabor rezultatov bo vseboval nič predmetov ali enega samega.