Para classificar os registros, você pode adicionar o seguinte ao final do seu sql
ORDER BY TO_DATE('01/'||month||'/'||year,'dd/mm/yyyy')
Observação:os nomes das colunas dinâmicas diferenciam maiúsculas de minúsculas, portanto, você precisa citá-los
aqui está a consulta completa, selecionando apenas as colunas necessárias:
SELECT mnth_txt,"Omsk_CNT","Omsk_SM","Novosibirsk_CNT",
"Novosibirsk_SM","Orenburg_CNT","Orenburg_SM"
FROM
(
SELECT *
FROM (
SELECT 1 cnt, 2 sm, '55' name, 12 month, 2011 year, '12 2011' mnth_txt FROM DUAL UNION ALL
SELECT 1 cnt, 2 sm, '54' name, 11 month, 2011 year, '11 2011' mnth_txt FROM DUAL UNION ALL
SELECT 1 cnt, 2 sm, '55' name, 11 month, 2011 year, '11 2011' mnth_txt FROM DUAL UNION ALL
SELECT 1 cnt, 2 sm, '54' name, 12 month, 2011 year, '12 2011' mnth_txt FROM DUAL UNION ALL
SELECT 1 cnt, 2 sm, '55' name, 12 month, 2011 year, '12 2011' mnth_txt FROM DUAL UNION ALL
SELECT 1 cnt, 2 sm, '56' name, 12 month, 2010 year, '12 2010' mnth_txt FROM DUAL )
PIVOT ( SUM(cnt) cnt, SUM(sm) sm
FOR NAME IN
( '55' AS "Omsk",'54' AS "Novosibirsk", '56' AS "Orenburg" )
)
ORDER BY TO_DATE('01/'||month||'/'||year,'dd/mm/yyyy')
)
