ORA Database Error Messages ORA-13909: Invalid combination of threshold value and operator August 25, 2015 mpbod ORA-13909: Invalid combination of threshold value and operator Cause: An attempt was made to specify an invalid combination of threshold value and operator. Action: Check the operator and threshold values and reissue statement. Back to previous menu Share this:Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)Click to share on Facebook (Opens in new window)Click to share on LinkedIn (Opens in new window)Click to share on Tumblr (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Pinterest (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Pocket (Opens in new window)