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I am using the code below to make the column of the month of January, but I could not find a way to return the month of February to the side.
SELECT 
    CASE 
    WHEN CODGRUPOPROD LIKE '20%' 
    THEN 'TALHA CORRENTE'
    WHEN CODGRUPOPROD LIKE '21%' 
    THEN 'TALHA CABO DE AÇO'
    WHEN CODGRUPOPROD LIKE '22%' 
    THEN 'PONTE ROLANTE'
    WHEN CODGRUPOPROD LIKE '23%'
    THEN 'SISTEMA LCS'
    WHEN CODGRUPOPROD LIKE '25%' 
    THEN 'MONOVIA'
    WHEN CODGRUPOPROD LIKE '27%'
    THEN 'GUINDASTE'
    ELSE 'OUTROS'
    END  AS 'EQUIPAMENTO',
    SUM(VLRUNIT * ITE.QTDNEG) AS JANEIRO
FROM
TGFCAB CAB
INNER JOIN TGFITE ITE ON CAB.NUNOTA = ITE.NUNOTA
INNER JOIN TGFPRO PRO ON ITE.CODPROD = PRO.CODPROD
WHERE 
CAB.AD_LIBERACAO_INTERNA BETWEEN '01/01/2021' AND '31/01/2021' AND CODTIPOPER IN (39,87,3100) AND AD_PEDIDO_CANCELADO IS NULL
GROUP BY 
    CASE 
    WHEN CODGRUPOPROD LIKE '20%' 
    THEN 'TALHA CORRENTE'
    WHEN CODGRUPOPROD LIKE '21%' 
    THEN 'TALHA CABO DE AÇO'
    WHEN CODGRUPOPROD LIKE '22%' 
    THEN 'PONTE ROLANTE'
    WHEN CODGRUPOPROD LIKE '23%'
    THEN 'SISTEMA LCS'
    WHEN CODGRUPOPROD LIKE '25%' 
    THEN 'MONOVIA'
    WHEN CODGRUPOPROD LIKE '27%'
    THEN 'GUINDASTE'
    ELSE 'OUTROS'
    END
THE RESULT IS THE RESULT OF THE IMAGE BELOW

I guess I could group just by code without the case:
GROUP BY CODGRUPOPROD. Over the month, you also need to group to bring separate values, for example add to select and group byYEAR(CAB.AD_LIBERACAO_INTERNA), MONTH(CAB.AD_LIBERACAO_INTERNA)– Ricardo Pontual
About the case in codgrupoprod is the question of the description of the group, now about the month, it would have to group the value , within that month in the" column" , when I use Month it group by row.
– Roberto Hawks
to help more need to have an example of the data... can add in question or mount an example of sqlfiddle.com for example?
– Ricardo Pontual