Sorting query output by Month name

Question

I am trying to extract values from Excel using an SQL Query, but what I've been struggling with is sorting the months in their respective order. Right now the table is being sorted A-Z, I tried playing around with DATEPART, but was not very successful as I was getting an Int16 error.

Select F1,
SUM(F2),
ROUND(SUM(REPLACE(F3, ',', '.')), 2),
ROUND(SUM(REPLACE(F4, ',', '.')), 2)
FROM [Sheet1$]
WHERE F1 IN ('January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December')
GROUP BY F1;

This is the query that works, but the result is:

I am also open to any suggestions that could improve my query speed as the document is quite big, about 50k rows, thanks.

For anyone wondering the final query that worked was:

Select F1,
SUM(F2),
ROUND(SUM(REPLACE(F3, ',', '.')), 2),
ROUND(SUM(REPLACE(F4, ',', '.')), 2)
FROM [Sheet1$]
WHERE F1 IN ('January', 'February', 'March', 'April', 'May', 'June',
'July', 'August', 'September', 'October', 'November', 'December')
GROUP BY F1
ORDER BY SWITCH(
F1='January', 1,
F1='February', 2,
F1='March', 3,
F1='April', 4,
F1='May', 5,
F1='June', 6,
F1='July', 7,
F1='August', 8,
F1='September', 9,
F1='October', 10,
F1='November', 11,
F1='December', 12
);

Answer 1

Either use a CASE expression:

Select
  f1,
  SUM(f2),
  ROUND(SUM(REPLACE(f3, ',', '.')), 2),
  ROUND(SUM(REPLACE(f4, ',', '.')), 2)
FROM [Sheet1$]
WHERE F1 IN ('January', 'February', 'March', 'April', 'May', 'June',
             'July', 'August', 'September', 'October', 'November', 'December')
GROUP BY F1
ORDER BY
  CASE F1
    WHEN 'January' THEN 1
    WHEN 'February' THEN 2
    WHEN 'March' THEN 3
    WHEN 'April' THEN 4
    WHEN 'May' THEN 5
    WHEN 'June' THEN 6
    WHEN 'July' THEN 7
    WHEN 'August' THEN 8
    WHEN 'September' THEN 9
    WHEN 'October' THEN 10
    WHEN 'November' THEN 111
    WHEN 'December' THEN 12
  END;

Or create a month table on the fly:

Select
  s.f1,
  SUM(s.f2),
  ROUND(SUM(REPLACE(s.f3, ',', '.')), 2),
  ROUND(SUM(REPLACE(s.f4, ',', '.')), 2)
FROM [Sheet1$] s
JOIN VALUES
(
  ('January', 1),
  ('February', 2),
  ('March', 3),
  ('April', 4),
  ('May', 5),
  ('June', 6),
  ('July', 7),
  ('August', 8),
  ('September', 9),
  ('October', 10),
  ('November', 11),
  ('December', 12)
) months(month_name, month_number) ON s.f1 = months.month_name
GROUP BY s.f1
ORDER BY months.month_number;

Or create a real month table.