问题，sql语句中直接将金额/100返回的结果会有多个小数位。
select cate.cate_name as name,sum(acc.money)/100 as value from account as acc left join conCategory as cate on acc.cateCode=cate.cate_code group by cate_name
FORMAT(money/100,2)
select cate.cate_name as name,FORMAT(sum(acc.money)/100,2) as value from account as acc left join conCategory as cate on acc.cateCode=cate.cate_code group by cate_name
保留两位小数，但是千位会有逗号，有逗号的话echarts之类的会不识别这个数据
truncate(money,2)
直接截取小数点后两位，不进行四舍五入。
select cate.cate_name as name,truncate(sum(acc.money)/100,2) as value from account as acc left join conCategory as cate on acc.cateCode=cate.cate_code group by cate_name
OK
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