import pymysql
# 打開(kāi)數(shù)據(jù)庫(kù)連接
db = pymysql.connect("localhost","root","root","db_test01" )
# 使用 cursor() 方法創(chuàng)建一個(gè)游標(biāo)對(duì)象 cursor
cursor = db.cursor()
# 使用 execute() 方法執(zhí)行 SQL 查詢(xún) 
cursor.execute("SELECT VERSION()")
# 使用 fetchone() 方法獲取單條數(shù)據(jù).
data = cursor.fetchone()
print ("Database version : %s " % data)
# 關(guān)閉數(shù)據(jù)庫(kù)連接
db.close()

import pymysql
# 打開(kāi)數(shù)據(jù)庫(kù)連接
db = pymysql.connect("localhost","root","root","db_test01" )
# 使用cursor()方法獲取操作游標(biāo) 
cursor = db.cursor()
# SQL 查詢(xún)語(yǔ)句
sql = "SELECT * FROM EMPLOYEE \
    WHERE INCOME > '%d'" % (1000)
try:
  # 執(zhí)行SQL語(yǔ)句
  cursor.execute(sql)
  # 獲取所有記錄列表
  results = cursor.fetchall()
  for row in results:
   fname = row[0]
   lname = row[1]
   age = row[2]
   sex = row[3]
   income = row[4]
    # 打印結(jié)果
   print ("fname=%s,lname=%s,age=%d,sex=%s,income=%d" % \
       (fname, lname, age, sex, income ))
except:
  print ("Error: unable to fetch data")
# 關(guān)閉數(shù)據(jù)庫(kù)連接
db.close()

import pymysql
# 打開(kāi)數(shù)據(jù)庫(kù)連接
db = pymysql.connect("localhost","root","root","db_test01" )
# 使用cursor()方法獲取操作游標(biāo) 
cursor = db.cursor()
# SQL 更新語(yǔ)句
sql = "UPDATE EMPLOYEE SET AGE = AGE + 1 WHERE SEX = '%c'" % ('M')
try:
  # 執(zhí)行SQL語(yǔ)句
  cursor.execute(sql)
  # 提交到數(shù)據(jù)庫(kù)執(zhí)行
  db.commit()
  print("update OK")
except:
  # 發(fā)生錯(cuò)誤時(shí)回滾
  db.rollback()
# 關(guān)閉數(shù)據(jù)庫(kù)連接
db.close()

import pymysql
# 打開(kāi)數(shù)據(jù)庫(kù)連接
db = pymysql.connect("localhost","root","root","db_test01" )
# 使用cursor()方法獲取操作游標(biāo) 
cursor = db.cursor()
# SQL 刪除語(yǔ)句
sql = "DELETE FROM EMPLOYEE WHERE AGE > '%d'" % (20)
try:
  # 執(zhí)行SQL語(yǔ)句
  cursor.execute(sql)
  # 提交修改
  db.commit()
  print("delete OK")         
except:
  # 發(fā)生錯(cuò)誤時(shí)回滾
  db.rollback()
# 關(guān)閉連接
db.close()