...1024还不够用 SET SESSION group_concat_max_len = 20480; select state, substring_index(group_concat(city order by pop ),,,1) smallestCity, min(pop),substring_index(group_concat(city order by pop ),,,-1)...
MySQL 查询in操作,查询结果按in集合顺序显示 复制代码 代码如下: select * from test where id in(3,1,5) order by find_in_set(id,3,1,5); select * from test where id in(3,1,5) order by substring_index(3,1,2,id,1);
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