Convert columns to rows and a column name in SQL Server -


i want convert columns rows in sql server:

id   value  jan1  jan2 ---------------------- 1     2      25    35 2     5      45    45

result should be

id  value month 1  2 ---------------------- 1    2     jan  25 35 2    5     jan  45 45

how can result? please help

what asking seems little strange. if extend example include columns feb1 , feb2, see 2 options transposing columns this:

+----+-------+------+------+------+------+ | id | value | jan1 | jan2 | feb1 | feb2 | +----+-------+------+------+------+------+ |  1 |     2 |   25 |   35 |   15 |   28 | |  2 |     5 |   45 |   45 |   60 |   60 | +----+-------+------+------+------+------+

transpose month part:

select id, value, monthname, monthvalue1, monthvalue2 t   cross apply (values ('jan',jan1,jan2),('feb',feb1,feb2)     ) v (monthname,monthvalue1,monthvalue2)

returns:

+----+-------+-----------+-------------+-------------+ | id | value | monthname | monthvalue1 | monthvalue2 | +----+-------+-----------+-------------+-------------+ |  1 |     2 | jan       |          25 |          35 | |  1 |     2 | feb       |          15 |          28 | |  2 |     5 | jan       |          45 |          45 | |  2 |     5 | feb       |          60 |          60 | +----+-------+-----------+-------------+-------------+

or transpose month columns so:

select id, value, monthname, monthvalue t   cross apply (values ('jan1',jan1),('jan2',jan2),('feb1',feb1),('feb2',feb2)     ) v (monthname,monthvalue)

returns: 

+----+-------+-----------+------------+ | id | value | monthname | monthvalue | +----+-------+-----------+------------+ |  1 |     2 | jan1      |         25 | |  1 |     2 | jan2      |         35 | |  1 |     2 | feb1      |         15 | |  1 |     2 | feb2      |         28 | |  2 |     5 | jan1      |         45 | |  2 |     5 | jan2      |         45 | |  2 |     5 | feb1      |         60 | |  2 |     5 | feb2      |         60 | +----+-------+-----------+------------+

rextester demo: http://rextester.com/kzv45690


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