使用python3操作mysql資料庫

因為使用的python3.6，所以需要載入pymysql庫，需要注意的是，python2和python3載入的庫是不一樣的。

pymysql.connect( host, port, user, passwd, db, charset )

如：host = 「localhost」,

port = 3306,

user = 「root」,

passwd = 「root」,

db = 「pachong」,

charset = 「utf8」

connect主要負責連通資料庫。真正運算元據庫，需要使用游標cursor：

cursor = conn.cursor()

# -*- coding: utf-8 -*-

import pymysql
conn = pymysql.connect( 
host =
"localhost"
, port =
3306
, user =
"root"
, passwd =
"root"
, db =
"pachong"
, charset =
"utf8"
)cursor = conn.cursor(
)sql =
"select * from question"
try:
cursor.execute( sql )
print
( cursor.rowcount )
res = cursor.fetchall(
)print
( res )
for line in res:
print
("第%d條，問題是：%s"
%( line[0]
, line[1]
))conn.commit(
)'''
res = cursor.fetchone()
print( res )
res = cursor.fetchmany( 2 )
print( res )
'''except exception as e:
print
( e )
conn.rollback(
)conn.close(
)cursor.close(
)

# -*- coding: utf-8 -*-

import pymysql
conn = pymysql.connect( 
host =
"localhost"
, port =
3306
, user =
"root"
, passwd =
"root"
, db =
"pachong"
, charset =
"utf8"
)cursor = conn.cursor(
)try
: sql_insert =
"insert into question( question_content ) values( '如何才能開開心心' )"
#sql_update = "update question set question_content = '已修改，如何才能開開心心' where question_id = 5"
#sql_delete = "delete from question where queston_id = 1"
#cursor.execute( sql_insert )
#print( "影響行數："+cursor.rowcount, "最後乙個的主鍵："+cursor.lastrowid )
#conn.commit()
except exception as e:
print
( e )
conn.rollback(
) 
cursor.close(
)conn.close(
)

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