纵表转横表的"SQL"示例：
纵表结构:
fname ftype fvalue
小乔 zaocan 10
小乔 zhongcan 20
小乔 wancan 5
转换后的表结构:
fname zaocan_value zhongcan_value wancan_value
小乔 10 20 5
纵表转横表SQL示例:
select Fname, sum(case Ftype when 'zaocan'
then Fvalue else 0 end) as zaocan_value,
sum(case Ftype when 'zhongcan'
then Fvalue else 0 end) as zhongcan_value,
sum(case Ftype when 'wancan' then Fvalue else 0 end)
as wancan_value from case_table group by Fname
