select *
from (select a.drugname,
a.drugform,
a.drugspec,
a.type flag,
max(a.maxzjprice) maxprice,
min(a.minzjprice) minprice
from REP_YEAR_DRUG_ZJJ a
group by a.drugname, a.drugform, a.drugspec, a.type)
pivot(max(maxprice) d, max(minprice) g
for flag in(1, 2))
这是按分类把列转行；超过两个以上的转列要给别名，不然会报错