摘要: SELECT a.id, substring_index( substring_index( a.code, ',', b.help_topic_id + 1 ), ',',- 1 ) age,a.year FROM t a JOIN mysql.help_topic b ON b.help_top 阅读全文
posted @ 2023-09-19 19:15 super超人 阅读(512) 评论(0) 推荐(0)