我通过内部联接将PostgreSQL中的两个表汇集在一起。第一个表格是导出的adwords文件（adwords_final。）。第二个表格只是对＆＃34;广告系列的引用＆＃34;要在Microsoft Excel中显示的列。这些广告系列仅在每个广告系列中发生一次，而adwords数据包含每个广告系列的多个条目，因为存在日期因素/列。
我使用以下查询将其输出到csv文件
COPY (SELECT * FROM adwords_final INNER JOIN mk_kw ON "mk_kw"."Key" = "adwords_final"."Key") TO 'C:\Users\iantu\Desktop\Performance Marketing\Report Outputs\adwords_final.csv' WITH CSV HEADER;
问题是我的新csv文件包含许多重复项。我在这里使用正确的命令还是应该转换为循环？
来自adwords_final的列
Week, Keyword state, Keyword Campaign, Ad group , Status , Max. CPC , Impressions, Interactions , Interaction Types , Interaction Rate Avg. Cost , Cost , Clicks ,Avg. position , Conversions, Quality score , Ad relevance , Landing page experience ,Expected clickthrough rate , Qual. score (hist.) ,Ad relevance (hist.) , Landing page experience (hist.) ,Expected clickthrough rate (hist.) ,Search Impr. share ,Match type , First position CPC , Top of page CPC ,First page CPC , Impressions with average ctr ,Impressions with above average ctr , Impressions with below average ctr ,Impressions with below average lp exp , Impressions with average lp exp ,Impressions with above average lp exp , Impressions with below average Ad Rel , Impressions with average ad rel , Impressions with above average ad rel , QSxIMP , Key
来自mk_kw的列
Language, Network, Main Keyword, Cluster Keyword 1 , Match Type, Key
由于