Question

我已连接到某些Oracle数据库，并尝试将数据导出到csv文件。下面是我的Python代码-

import jpype
import jaydebeapi
import csv

# Assuming I already have established a connection -
# Connection variable is Conn

Curs = Conn.cursor()
Curs.execute("select * from Table")
Data = list(Curs.fetchall())

with open("mycsvfile.csv", "wb") as f:
    w = csv.DictWriter(f, Data[0].keys())
    w.writerow(dict((fn,fn) for fn in Data[0].keys()))
    w.writerows(Data)

但是当我运行上面的代码时，出现错误--

Traceback (most recent call last):
  File "<stdin>", line 2, in <module>
AttributeError: 'tuple' object has no attribute 'keys'

您能帮我找到一条出路吗？

非常感谢您的帮助

Answer 1

您可以使用sqlplus或SQLcl轻松生成csv：

https://docs.oracle.com/en/database/oracle/oracle-database/12.2/sqpug/generating-HTML-reports-from-SQL-Plus.html

https://oracle-base.com/articles/misc/sqlcl-format-query-results-with-the-set-sqlformat-command

https://www.thatjeffsmith.com/archive/2015/02/a-quick-4-1-trick-set-sqlformat/

Answer 2

我正在使用此代码使用Python创建一个csv文件（在我的示例中为headers）。我认为您应该尝试cx_Oracle，对我来说，这是从Python与Oracle数据库进行交互的最佳方法。

import os
import sys
import cx_Oracle 

db = cx_Oracle.connect('user/pass@host:port/service_name')
SQL = "select column1 , column2 , .... , columnn from table"
print(SQL)
cursor = db.cursor()
f = open("C:\myfile.csv", "w")
writer = csv.writer(f, lineterminator="\n", quoting=csv.QUOTE_NONNUMERIC)
r = cursor.execute(SQL)

#this takes the column names
col_names = [row[0] for row in cursor.description]

writer.writerow(col_names)

for row in cursor:
   writer.writerow(row)
f.close()

从Oracle DB下载数据并导出到CSV文件

2 个答案: