python通过MySQLdb访问mysql数据库详解编程语言

需要安装MySQLdb，windows下安装需要下载setup文件。

#!/usr/bin/python 
 
import MySQLdb 
def doInsert(cursor,db): 
  #insert 
  # Prepare SQL query to INSERT a record into the database. 
  sql = "UPDATE EMPLOYEE SET AGE = AGE+1 WHERE SEX = '%c'" %('M') 
  try: 
    cursor.execute(sql) 
    db.commit() 
  except: 
    db.rollback() 
 
def do_query(cursor,db): 
  sql = "SELECT * FROM EMPLOYEE / 
          WHERE INCOME > '%d'" % (1000) 
  try: 
      # Execute the SQL command 
     cursor.execute(sql) 
     # Fetch all the rows in a list of lists. 
     results = cursor.fetchall() 
     print 'resuts',cursor.rowcount 
     for row in results: 
        fname = row[0] 
        lname = row[1] 
        age = row[2] 
        sex = row[3] 
        income = row[4] 
        # Now print fetched result 
        print "fname=%s,lname=%s,age=%d,sex=%s,income=%d" % / 
                (fname, lname, age, sex, income ) 
  except: 
      print "Error: unable to fecth data" 
 
def do_delete(cursor,db): 
  sql = 'DELETE FROM EMPLOYEE WHERE AGE > {}'.format(20) 
  try: 
    cursor.execute(sql) 
    db.commit() 
  except: 
    db.rollback() 
 
def do_insert(cursor,db,firstname,lastname,age,sex,income): 
  sql = "INSERT INTO EMPLOYEE(FIRST_NAME, / 
       LAST_NAME, AGE, SEX, INCOME) / 
       VALUES ('%s', '%s', '%d', '%c', '%d' )" % / 
       (firstname,lastname,age,sex,income) 
  try: 
    cursor.execute(sql) 
    db.commit() 
  except: 
    db.rollback() 
 
# Open database connection 
# change this to your mysql account 
#connect(server,username,password,db_name) 
db = MySQLdb.connect("localhost","hunter","hunter","pydb" ) 
# prepare a cursor object using cursor() method 
cursor = db.cursor() 
do_query(cursor,db) 
doInsert(cursor,db) 
do_query(cursor,db) 
do_delete(cursor,db) 
do_query(cursor,db) 
do_insert(cursor,db,'hunter','xue',22,'M',2000) 
do_insert(cursor,db,'mary','yang',22,'f',5555) 
do_insert(cursor,db,'zhang','xue',32,'M',5000) 
do_insert(cursor,db,'hunter','xue',22,'M',333) 
do_query(cursor,db) 
# disconnect from server 
db.close()