MySQL, INSERT ... SELECT ... FROM DUAL

CREATE TABLE bibles.readers(
  rid INT(11) NOT NULL AUTO_INCREMENT,
  firstName VARCHAR(32) DEFAULT NULL,
  secondName VARCHAR(32) DEFAULT NULL,
  blocked INT(11) NOT NULL DEFAULT 0,
  PRIMARY KEY (rid)
)
ENGINE = MYISAM
AUTO_INCREMENT = 1
CHARACTER SET cp1251
COLLATE cp1251_bin;

INSERT INTO readers (secondName)
  SELECT secondName FROM DUAL
  WHERE NOT EXISTS(
    SELECT secondName FROM readers
      WHERE firstName = @fName AND secondName = @sName LIMIT 1);

Unknown column 'secondName' in 'field list'