重新命名用as关键字
发现一遍文章:https://blog.csdn.net/baidu_41690072/article/details/79222860?ops_request_misc=%257B%2522request%255Fid%2522%253A%2522163877871416780264023680%2522%252C%2522scm%2522%253A%252220140713.130102334.pc%255Fall.%2522%257D&request_id=163877871416780264023680&biz_id=0&utm_medium=distribute.pc_search_result.none-task-blog-2~all~first_rank_ecpm_v1~rank_v31_ecpm-2-79222860.pc_search_result_cache&utm_term=%E6%95%B0%E6%8D%AE%E5%BA%93as&spm=1018.2226.3001.4187
具体实现:
select device_id as user_infos_example from user_profile limit 0,2;
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