题解 | DELETE用法
删除emp_no重复的记录,只保留最小的id对应的记录。
https://www.nowcoder.com/practice/3d92551a6f6d4f1ebde272d20872cf05
DELETE FROM titles_test
WHERE
id NOT IN (
SELECT * FROM(SELECT min(id) FROM titles_test
GROUP BY emp_no) AS new_id)
删除emp_no重复的记录,只保留最小的id对应的记录。
https://www.nowcoder.com/practice/3d92551a6f6d4f1ebde272d20872cf05
DELETE FROM titles_test
WHERE
id NOT IN (
SELECT * FROM(SELECT min(id) FROM titles_test
GROUP BY emp_no) AS new_id)
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