groupby去除重复数据
时间: 2023-09-03 09:07:16 浏览: 160
去除重复数据
使用groupby可以去除重复数据。在MySQL中,使用group by可以对查询的所有字段完全重复的数据进行去重,而不仅仅是对group by后面连接的单个字段重复的数据进行去重。在Python中,可以使用itertools中的groupby函数来去除重复数据。groupby函数的作用是将可迭代对象中相邻的重复元素挑出来放在一起。例如,可以使用groupby函数将列表中相邻的重复元素挑出来并只保留一个元素,从而达到去重的效果。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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- *1* *2* [MySQL - DISTINCT & GROUP BY 去重](https://blog.csdn.net/Dream_Weave/article/details/116848896)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
- *3* [【Python编程】删除列表中具有连续重复项的元素](https://blog.csdn.net/be_racle/article/details/124761429)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v93^chatsearchT3_1"}}] [.reference_item style="max-width: 50%"]
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