Python使用cx_Oracle模块将oracle中数据导出到csv文件的方法

# Export Oracle database tables to CSV files
# FB36 - 201007117
import sys
import csv
import cx_Oracle
connection = raw_input("Enter Oracle DB connection (uid/pwd@database) : ")
orcl = cx_Oracle.connect(connection)
curs = orcl.cursor()
printHeader = True # include column headers in each table output
sql = "select * from tab" # get a list of all tables
curs.execute(sql)
for row_data in curs:
  if not row_data[0].startswith('BIN$'): # skip recycle bin tables
    tableName = row_data[0]
    # output each table content to a separate CSV file
    csv_file_dest = tableName + ".csv"
    outputFile = open(csv_file_dest,'w') # 'wb'
    output = csv.writer(outputFile,dialect='excel')
    sql = "select * from " + tableName
    curs2 = orcl.cursor()
    curs2.execute(sql)
    if printHeader: # add column headers if requested
      cols = []
      for col in curs2.description:
        cols.append(col[0])
      output.writerow(cols)
    for row_data in curs2: # add table rows
      output.writerow(row_data)
    outputFile.close()