IT工程師數位筆記本

#coding=UTF-8import sysimport MySQLdbimport timereload(sys)sys.setdefaultencoding('utf-8')def connectDemo():  return MySQLdb.Connection("127.0.0.1","root","root","demo",3306,charset="utf8")if __name__ == '__main__':  begin=time.time()  conn=connectDemo()  cursor = conn.cursor()  sql="""    show tables    """  count = cursor.execute(sql)  rows = cursor.fetchall()  cursor.close()  conn.close()  print "========demo庫共:%s 張表============" % (count)  print '耗時:%s 秒' % (time.time()-begin)

import MySQLdbconn = MySQLdb.connect(host="localhost",user="root",passwd="123456",db="test")cursor = conn.cursor()cursor.execute("select * from hard")res = cursor.fetchall()for x in res:print xcursor.close()conn.close()

root@10.1.1.45:~# apt-get install python-mysqldb root@10.1.1.45:~# python Python 2.5.2 (r252:60911, Jan 4 2009, 21:59:32)  [GCC 4.3.2] on linux2 Type "help", "copyright", "credits" or "license" for more information. >>> import MySQLdb >>> 

root@10.1.1.45:python# cat create.py  #!/usr/bin/env python #coding=utf-8  #導入相關模塊 import MySQLdb  #建立和mysql數據庫的連接 conn = MySQLdb.connect(host='localhost',user='root',passwd='davehe') #獲取游標 curs = conn.cursor() #執行SQL,創建一個數據庫 curs.execute("create database pythondb") #選擇連接哪個數據庫 conn.select_db('pythondb') #執行SQL,創建一個表 curs.execute("create table test(id int,message varchar(50))") #插入一條記錄 value = [1,"davehe"] curs.execute("insert into test values(%s,%s)",value) #插入多條記錄 values = [] for i in range(20):   values.append((i,'hello mysqldb' + str(i))) curs.executemany("insert into test values(%s,%s)",values) #提交修改                 conn.commit() #關閉游標連接,釋放資源 curs.close() #關閉連接 conn.close() root@10.1.1.45:python# ./create.py 

root@10.1.1.45:python# cat select.py  #!/usr/bin/env python #coding=utf-8  #導入相關模塊 import MySQLdb  #建立和mysql數據庫的連接 conn = MySQLdb.connect(host='localhost',user='root',passwd='hc1226') #獲取游標 curs = conn.cursor() #選擇連接哪個數據庫 conn.select_db('pythondb') #查看共有多少條記錄 count = curs.execute('select * from test') print "一共有%s條記錄" % count #獲取一條記錄,以一個元組返回 result = curs.fetchone() print "當前的一條記錄 ID:%s message:%s" % result #獲取后10條記錄,由于之前執行了getchone(),所以游標已經指到第二條記錄,下面也就從第二條記錄開始返回 results = curs.fetchmany(10) for r in results:   print r #重置游標位置,0,為偏移量,mode = relative(默認) curs.scroll(0,mode='absolute') #獲取所有記錄 results = curs.fetchall() for r in results:   print r  #提交修改 conn.commit() #關閉游標連接,釋放資源 curs.close() #關閉連接 conn.close() 

root@10.1.1.45:python# ./select.py  一共有21條記錄 當前的一條記錄 ID:1 message:davehe (0L, 'hello mysqldb0') (1L, 'hello mysqldb1') (2L, 'hello mysqldb2') (3L, 'hello mysqldb3') (4L, 'hello mysqldb4') (5L, 'hello mysqldb5') (6L, 'hello mysqldb6') (7L, 'hello mysqldb7') (8L, 'hello mysqldb8') (9L, 'hello mysqldb9') (1L, 'davehe') (0L, 'hello mysqldb0') (1L, 'hello mysqldb1') (2L, 'hello mysqldb2') (3L, 'hello mysqldb3') (4L, 'hello mysqldb4') (5L, 'hello mysqldb5') (6L, 'hello mysqldb6') (7L, 'hello mysqldb7') (8L, 'hello mysqldb8') (9L, 'hello mysqldb9') (10L, 'hello mysqldb10') (11L, 'hello mysqldb11') (12L, 'hello mysqldb12') (13L, 'hello mysqldb13') (14L, 'hello mysqldb14') (15L, 'hello mysqldb15') (16L, 'hello mysqldb16') (17L, 'hello mysqldb17') (18L, 'hello mysqldb18') (19L, 'hello mysqldb19')