用SQL语句去掉重复的记录（转）

https://blog.csdn.net/black_ben/article/details/6311795?spm=1001.2101.3001.6650.1&utm_medium=distribute.pc_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7Edefault-1.highlightwordscore&depth_1-utm_source=distribute.pc_relevant.none-task-blog-2%7Edefault%7EOPENSEARCH%7Edefault-1.highlightwordscore