我正在使用Jupyter笔记本来处理postgresql的一些数据库,我有以下实例:
import pandas as pd
import (other packages)
conn_string= % I can't show this, but this is ok
conn = psycopg2.connect(conn_string)
cursor=conn.cursor
query= """ copy (select col1,col2 from Table where col3=a_parameter
and col4=b_parameter) to '/tmp/test.csv' with csv """
pd.read_sql(query,conn)
但是我得到了这个错误:
**ProgrammingError: syntax error at or near "("
LINE 1: COPY (select col1,col2 from Table where col3...**
^
为什么复制句子有错误?我使用的是Postresql 8.0.2
发布于 2019-07-11 04:40:29
你可以这样做:
query= """ copy (select col1,col2 from Table where col3=a_parameter
and col4=b_parameter) """
df=pd.read_sql(query,con=conn)
df.to_csv("name.csv",sep=",")
发布于 2018-06-08 08:13:27
如下所示:
import csv
my_file_csv = my_folder + "\Report_Trip_Day_" + my_opr + "_" + my_local_database + ".csv"
out = csv.writer(open(my_file_csv, "w", newline=''), delimiter=',', quoting=csv.QUOTE_ALL)
out.writerow(colnames)
for row in my_xls_report_table:
out.writerow(row)
https://stackoverflow.com/questions/50748504
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