python 操作 mysql，pythonmysql,查询（两种方法）：```

python 操作 mysql，pythonmysql,查询（两种方法）：```

查询（两种方法）：```pythonimport MySQLdb

conn = MySQLdb.connect (host = "localhost", user = "root", passwd = "root", db = "fish")
cursor = conn.cursor ()

cursor.execute ("SELECT * FROM polls_poll")rows = cursor.fetchall() #获取所有结果集for row in rows: #从结果集中一条一条读出来 print "%d, %s, %s" % (row[0], row[1], row[2])

print "Number of rows returned: %d" % cursor.rowcount

cursor.execute ("SELECT * FROM polls_poll")
while (True):
row = cursor.fetchone() #从结果集的开始，获取一条记录, 移动一下游标，直到结束返回None if row == None:
break
print "%d, %s, %s" % (row[0], row[1], row[2])

print "Number of rows returned: %d" % cursor.rowcount

cursor.close ()
conn.close ()

 插入： ```pythoncursor.execute ("INSERT INTO two(name, age) VALUES ('bill', 18)")  #返回受影响的行数，执行错误返回异常

更新：

cursor.execute ("UPDATE two SET name = 'jack', age = '22' WHERE name = 'bill'")  #返回受影响的行数，执行错误返回异常