python使用MySQLdb访问mysql数据库的方法

本文实例讲述了python使用MySQLdb访问mysql数据库的方法。分享给大家供大家参考。具体如下：

    #!/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()

希望本文所述对大家的Python程序设计有所帮助。