摘要：转自：https://www.cnblogs.com/David3290/p/11378579.html SELECT a.id, a. NAME, substring_index( substring_index( a.shareholder,',',b.help_topic_id + 1),', 阅读全文

摘要：1：[Err] 1055 - Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'information_schema.PROFILING.SEQ' which i 阅读全文