Python MySQL进行数据库表变更和查询

Python连接MySQL，进行数据库表变更和查询：

python mysql insert delete query：

#!/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","root","root","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()

之后可以在此基础上根据需要进行封装。

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来源：http://blog.csdn.net/jiyingying_up/article/details/9928905