用MySQL的SUBSTRING_INDEX和SUBSTRING函数来拆分字符串 SET SESSION group_concat_max_len = 1000000; DROP TEMPORARY TABLE IF EXISTS temp_data; CREATE TEMPORARY TABLE temp_data AS SELECT SUBSTRING_INDEX(SUBSTRING_INDEX(SUBSTRING_INDEX(IMEI_rel, '使用过', -1), '】', numbers1.n), '【', -1) AS...
-- (SELECT a.verify_no,a.relation_ids, SUBSTRING_INDEX(SUBSTRING_INDEX(a.relation_ids,',',b.id),',',-1) AS resultNAME FROM fc_corms_cost_verify a JOIN fc_add_canopy b ON b.id < (LENGTH(a.relation_ids) - LENGTH(REPLACE(a.relation_ids,',',''))+2)where a.relation_ids lik...
select username,PARTITION BY age order by age descuuid from ( select uuid ,username ,`password` ,age from `user` ) b GROUP BY uuid asc; (网上copy的代码,有误,但我们关注的重点是关键字改造替换后的区别!) MySQL中的SQL如下(改造后): select username,SUBSTRING_INDEX( GROUP_CONCAT(age order by...
CREATE INDEX indexName ON z_staff_info_copy1(username(LENGTH));#修改表结构添加... HelloOcean 0 635 mysql的group by 2019-12-23 21:13 − Group By 有几个规律: Group by的语法:"Group by <字段>“意为按照字段进行分类汇总。这里需要注意四点: (1)按照你的分类要求Group by 后字段里没....