SELECT year_2011.invoice_month,

       year_2011,

       year_2012,

       year_2013

FROM (

    SELECT EXTRACT(MONTH FROM CAST(invoice_date AS date)) AS invoice_month,

       COUNT(invoice_id) AS year_2011

FROM invoice AS i

WHERE EXTRACT(YEAR FROM CAST(invoice_date AS date)) = 2011

GROUP BY 1

ORDER BY 2 DESC

    ) AS year_2011

LEFT JOIN

    (

    SELECT EXTRACT(MONTH FROM CAST(invoice_date AS date)) AS invoice_month,

       COUNT(invoice_id) AS year_2012

FROM invoice AS i

WHERE EXTRACT(YEAR FROM CAST(invoice_date AS date)) = 2012

GROUP BY 1

ORDER BY 2 DESC

    ) AS year_2012 ON year_2011.invoice_month=year_2012.invoice_month

LEFT JOIN

    (

    SELECT EXTRACT(MONTH FROM CAST(invoice_date AS date)) AS invoice_month,

       COUNT(invoice_id) AS year_2013

FROM invoice AS i

WHERE EXTRACT(YEAR FROM CAST(invoice_date AS date)) = 2013

GROUP BY 1

ORDER BY 2 DESC

    ) AS year_2013 ON year_2011.invoice_month=year_2013.invoice_month