mysql 两张表 city表和province表。分别为城市与省份的关系表。

select c1.provinceid,p1.province,count(1) pronums from city c1 inner join province p1 on c1.provinceid=p1.id

group by c1.provinceid,p1.province

select case stf.stationType when 'RAIN' then '雨情站' when 'RECIMEI' then '水位站' else '流量站' end tationName from radar_stations_info stf

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