mysql--记2次脏数据清理

有时候程序执行的过程中，可能有逻辑漏洞，导致同样一条数据多次insert到表里，造成了垃圾数据，在清理的时候又不能一杆子都打死，需要将重复数据中，id最小的保留

DELETE FROM public_sentiment WHERE id IN (
    SELECT * FROM (
        SELECT id FROM public_sentiment WHERE (sentiment_id,vuln_name)         IN (
            SELECT sentiment_id,vuln_name FROM public_sentiment GROUP BY sentiment_id,vuln_name HAVING COUNT(1) > 1
        ) AND id NOT IN (
            SELECT MIN(id) FROM public_sentiment GROUP BY sentiment_id,vuln_name HAVING COUNT(1) > 1
        )
    ) AS repeat_copy

);

DELETE FROM 表名 WHERE id IN (
    SELECT * FROM (
        SELECT id FROM 表名 WHERE (字段名1)  IN (
            SELECT 字段名1 FROM 表名 GROUP BY 字段名1 HAVING COUNT(1) > 1
        ) AND id NOT IN (
            SELECT MIN(id) FROM 表名 GROUP BY 字段名1  HAVING COUNT(1) > 1
        )
    ) AS repeat_copy

);

标签：COUNT,GROUP,sentiment,--,表名,次脏,mysql,id,SELECT
来源： https://www.cnblogs.com/lutt/p/16301065.html