COPY (select id as ID, description as TNAME from my_table order by id) to ‘C:/exp4analyze/MyTable.csv’ with csv header;

ERROR: could not open file “C:/exp4analyze/MyTable.csv” for writing: No such file or directory

原因：目錄不存在

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COPY (select id as ID, description as TNAME from my_table order by id) to ‘C:/exp4analyze/MyTable.csv’ with csv header;

ERROR: could not open file “C:/Users/exp4analyze/MyTable.csv” for writing: Permission denied

原因：不能將導出路徑放在系統文件夾下（C盤其他文件夾可以）

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COPY (select id as ID, description as TNAME from my_table order by id) to ‘D:/exp4analyze/MyTable.csv’ with csv header;

Query returned successfully: 279 rows affected, 12 msec execution time.

正確結果

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PS：如果出現 Invalid Argument 錯誤，考慮是“命令行”窗口或“pgAdmin”工具缺少管理員權限的原因。

總結

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