//最大值select max(price) max,date from on_jiaoyi_into group by date//最小值select min(price) min,date from on_jiaoyi_into group by date//开盘价select a.price,a.date from (select price,date from on_jiaoyi_into where sid=3order by date,time ) a group by date//收盘价select a.price,a.date from (select price,date from on_jiaoyi_into where sid=3order by date,time desc) a group by dateselect zdz.max,zxz.min,kpj.kpj,spj.spj from (/*最大值*/select max(price) max,date,id from on_jiaoyi_into group by date) zdz left join (/*最小值*/select min(price) min,date,id from on_jiaoyi_into group by date) zxz on zdz.id=zxz.idleft join(/*开盘价*/select a.price kpj,a.date,a.id from (select price,date,id from on_jiaoyi_into where sid=3 order by date,time ) a group by date ) kpjon zdz.id=kpj.idleft join(/*收盘价*/select b.price spj,b.date,b.id from (select price,date,id from on_jiaoyi_into where sid=3 order by date,time desc) b group by date ) spj on zdz.id=spj.id
最后join出来的结果有一个字段是空值，最后想了想，因为他们的最大值、最小值、开盘价、收盘价有可能不是一个ID。。。。。
那么，只有把上面四条语句查询出来的结果用合并数组的方法才是正确的。。。
