mysql 語句將字符串轉行

mysql 語句將字符串轉行 示例 ( SELECT 考籍號,GROUP_CONCAT(kemu) ‘kemu2’ from ( SELECT 考籍號,substring_index(substring_index(t.考試科目,’,’, b.help_topic_id + 1), ‘,’, -1) ‘kemu’ FROM 省考籍信息77923 t join mysql.help_topic b

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