设表源为 tab_a 表create table tab_a asSelect '浙江' sf,'杭州' city,'a' rid ,'10' num from dual union allSelect '浙江','杭州','b','30' from dual union allSelect '浙江','杭州','c','20' from dual union allSelect '浙江','温州','a','10' from dual union allSelect '浙江','温州','b','3...
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