python mysql data change and query

首先下载MySQLdb 安装

python连接mysql，进行数据库表变更和查询：

 

python mysql insert delete query：

 

#!/usr/bin/pythonimport MySQLdbdef 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() methodcursor = 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 serverdb.close()

 

之后可以在此基础上根据需要进行封装。