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表结构如下：
date,a,b,c0101,1,2,30202,4,5,6
要转换成：
date,col1,col20101,a,10202,a,40101,b,20202,b,50101,c,30202,c,6
想了很久，不知道该如何去写。使用Python的pandas和sql都可以，十分感谢！
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可以用pandas的melt方法
a = pd.DataFrame([[0101,1,2,3],[0202,4,5,6]],columns=['date','a','b','c'])date a b c0 65 1 2 31 130 4 5 6pd.melt(a,id_vars=['date'],var_name='col1',value_name='col2')
date col1 col20 65 a 11 130 a 42 65 b 23 130 b 54 65 c 35 130 c 6
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About the conversion problem of a table in SQL-PHP Chinese website Q&A-About the conversion problem of a table in SQL-PHP Chinese website Q&A
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可以用pandas的melt方法
a = pd.DataFrame([[0101,1,2,3],[0202,4,5,6]],columns=['date','a','b','c'])
date a b c0 65 1 2 31 130 4 5 6
pd.melt(a,id_vars=['date'],var_name='col1',value_name='col2')
date col1 col20 65 a 11 130 a 42 65 b 23 130 b 54 65 c 35 130 c 6