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如何在数据量大的时候找到重复的数据? select id,SchemeId as s from orderaction GROUP BY SchemeId HAVING COUNT(s)>1 ***要是上面看不懂,可以添加count()函数计数*** select id,count(SchemeId 阅读全文
摘要:
DBeaver下载地址:https://dbeaver.io/download/ 1、打开DBeaver,搜impala 2、下载impala驱动,然后解压ClouderaImpalaJDBC-2.6.34.1065 1)impala驱动下载地址:https://www.cloudera.com/d 阅读全文