python

 import datetime

import pandas as pd
import cx_Oracle
con = cx_Oracle.connect('SYSTEM/oracle123@localhost:1521/xe')
c = con.cursor()
sql = "select * from covid_data"
res = c.execute(sql)
t = pd.read_sql(sql,con)
t.to_csv(r'C:\Users\abc\covid.csv')

#t.to_csv(r'C:\Users\abc\covid.csv', mode='w')