docs/8.0/ayanova/docs/ay-start-common-controls.md

@@ -23,3 +23,8 @@ todo: DATA TABLES
 	note: filtering system, column view system, saving filter, case sensitivity, tokens etc	
 	hidden query-affecting columns: Data Table column selector button will change to larger and accented when this is the case and the column selector form will highlight these hidden columns that affect the view with raised elevation, accent color and filter+sort icon (both show, there is no distinction which type of way it's affecting)
 
+	Data table filtering on Duration / interval type columns:		
+	Filters are limited to greater than or less than due to nature of this type of data which is very hard to match precisely due to millisecond differences
+	making equals or not equals useless for exact comparison.  In addition these types of fields always have a value even if it's zero so they don't work with Has value / no Value either
+	Greater than and less than can be used to match any value desired by using two filters one greater one less and use of the OR or AND option as appropriate
+