select @sh=sum(convert(float,k)) from gz where a='上海'
select @hz=sum(convert(float,k)) from gz where a='杭州'
select @kq=sum(convert(float,k)) from gz where a='康橋'
select @ks=sum(convert(float,k)) from gz where a='昆山'
select @dg=sum(convert(float,k)) from gz where a='東莞'
select @sj=sum(convert(float,k)) from gz where a='松江'
select @sz=sum(convert(float,k)) from gz where a='蘇州'
select @cq=sum(convert(float,k)) from gz where a='重庆'
select @all=sum(convert(float,k)) from gz