Why is this SQLite in JavaScript not working?

I have included SQLite and SQLite statements in my program. I have a table named PILE and I am trying to work with that table.

tx.executeSql(

"UPDATE PILE SET ? = COALESCE( (SELECT ? FROM PILE WHERE word = ?), 0 ) -1 WHERE word = ?", 

            [category1, category1, incorrectmanualanswer, incorrectmanualanswer] ,
 errorcode  );

alert("down "+category1+"+"+incorrectmanualanswer);

The above does not execute. I do see the correct values in the following alert window

But the below executes perfectly

function screenONEpress(tx) 
{               
tx.executeSql(

"UPDATE PILE SET frequency = COALESCE( (SELECT frequency FROM PILE WHERE word = ?), 0 ) + 1 

WHERE word = ?", [newEword, newEword] , errorcode   );

}