First, need to create a saved search of this custom record. Provide the criteria you wanted and save the search.
In the search result page, enable the Inline Edit option
Then Click any editable column denoted by a pencil icon from the first record in the list.
Hold the Shift key then click the mouse pointer up to the column to be deleted. The selected column will display a dotted border when selected.
Then Click the Delete button on the keyboard. Then the entire selected entry records will get deleted.
