ORA Database Error Messages ORA-12997: cannot drop primary key column from an index-organized table August 12, 2015 mpbod ORA-12997: cannot drop primary key column from an index-organized table Cause: An attempt was made to drop a primary key column from an index- organized table. Action: This action is not allowed. Back to previous menu https://support.oracle.com/ http://www.oracle.com/ 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)