python cx_Oracle的基础使用方法(连接和增删改查)

oracle_tns = cx_Oracle.makedsn('XXX.XXX.XXX.XXX', 1521,'oracleName')
connectObj = cx_Oracle.connect('oracleUserName', 'password', oracle_tns)

db = cx_Oracle.connect('hr', 'hrpwd', 'localhost:1521/XE')
db1 = cx_Oracle.connect('hr/hrpwd@localhost:1521/XE')

connectObj.close()

cursorObj = connectObj.cursor()

cursorObj.close()

sql = "INSERT INTO T_AUTOMONITOR_TMP(point_id) VALUES(:pointId)"
cursorObj.prepare(sql)
rown = cursorObj.execute(None, {'pointId' : pointId})
connectObj.commit()

sql = "INSERT INTO T_AUTOMONITOR_TMP(point_id) VALUES(:pointId)"
cursorObj.prepare(sql)
rown = cursorObj.executemany(None, recordList)
connectObj.commit()

sql = "DELETE FROM T_AUTOMONITOR_TMP t WHERE t.point_id = :pointId "
cursorObj.prepare(sql)
rown = cursorObj.execute(None, {'pointId' : pointId})
connectObj.commit()

sql = "UPDATE t_automonitor_other t\
  SET t.active = '2'\
  WHERE t.active = '1'\
  AND t.point_id = :pointId\
  "
cursorObj.prepare(sql)
cursorObj.execute(None, {'pointId' : pointId})
connectObj.commit()

sql = "SELECT t.describ FROM t_automonitor_tmp t WHERE t.point_id = :pointId"
cursorObj.prepare(sql)
cursorObj.execute(None, {'pointId' : pointId})

r1 = cursor.execute('SELECT * FROM locations WHERE country_id=:1 AND city=:2', ('US', 'Seattle'))
r2 = cursor.execute('SELECT * FROM locations WHERE country_id=:9 AND city=:4', ('US', 'Seattle'))
r3 = cursor.execute('SELECT * FROM locations WHERE country_id=:m AND city=:0', ('US', 'Seattle'))

class baseUtilsX():
 """baseUtils"""
 def __init__(self):
  self.connectObj = ""
  self.connCnt = 0
  self.cursorCnt = 0

 def initOracleConnect(self):
  oracle_tns = cx_Oracle.makedsn('XXX.XXX.XXX.XXX', 1521,'XX')
  if self.connCnt == 0:
   self.connectObj = cx_Oracle.connect('oracleUserName', 'password', oracle_tns)
   self.connCnt += 1

 def getOracleConnect(self):
  self.initOracleConnect()
  return self.connectObj
 
 def closeOracleConnect(self, connectObj):
  connectObj.close()
  self.connCnt -= 1

 def getOracleCursor(self):
  self.initOracleConnect()
  self.cursorCnt += 1
  return self.connectObj.cursor()

 def closeOracleCursor(self, cursorObj):
  cursorObj.close()
  self.cursorCnt -= 1
  if self.cursorCnt == 0:
   print "will close conn"
   self.closeOracleConnect(self.connectObj)

 def selectFromDbTable(self, sql, argsDict):
  # 将查询结果由tuple转为list
  queryAnsList = []
  selectCursor = self.getOracleCursor()
  selectCursor.prepare(sql)
  queryAns = selectCursor.execute(None, argsDict)
  for ansItem in queryAns:
   queryAnsList.append(list(ansItem))

  self.closeOracleCursor(selectCursor)
  return queryAnsList

import os
os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8'

# -*- coding: utf-8 -*-

# -*- coding: utf-8 -*-

import os
os.environ['NLS_LANG'] = 'SIMPLIFIED CHINESE_CHINA.UTF8' #或者os.environ['NLS_LANG'] = 'AMERICAN_AMERICA.AL32UTF8'

 

import cx_Oracle
db = cx_Oracle.connect(username/passwd@host:port/sevicename)
cursor = db.cursor()
#其他操作

db.commit()
db.close()