mysql group by
2011-12-12 17:40
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select address,count(*) as num from table1 group by a,b,c,d order by num desc limit 10; 查找表中a,b,c,d字段相同的记录的address和条数,取最多的10条记录
insert into table2 select concat(concat(cid,''),LPAD(concat(pid,''),2,0),LPAD(concat(ccid,''),2,0),'00000'),
pro,city,count(*) as num from table3 group by cid,pid,ccid order by num desc
insert into table2 select concat(concat(cid,''),LPAD(concat(pid,''),2,0),LPAD(concat(ccid,''),2,0),'00000'),
pro,city,count(*) as num from table3 group by cid,pid,ccid order by num desc
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