1 >>> import pymysql
 2 >>> conn=pymysql.connect(host='localhost',user='root',passwd='password',charset='utf8',port=3306)
 3 #port一般都是3306，charset要写utf8，不然可能会出现乱码
 4 >>> cur=conn.cursor()
 5 #查看有哪些数据库
 6 >>> cur.execute('show databases')
 7 >>> databases=[]
 8 >>> for i in cur:
 9     databases.append(i)
10 >>> databases
11 [('information_schema',), ('firstdb',), ('hive',), ('jeesite',), ('mysql',), ('school',), ('test',), ('test1',), ('test2015',)]
12 #选择数据库
13 >>> conn.select_db('test')
14 #如果一开始就知道选什么数据库，可以把数据库参数加到connect的语句里：
15 #conn=pymysql.connect(host='localhost',user='root',passwd='password',db='test',charset='utf8',port=3306)
16 #查看有哪些表
17 >>> cur.execute('show tables')
18 #fetchall是获得所有的查询结果
19 >>> tables_list=cur.fetchall()
20 >>> tables_list
21 (('user',), ('user2',), ('user3',), ('user4',), ('user5',), ('user6',), ('user7',))
22 #创建table
23 >>> cur.execute('create table user8(id varchar(10),name varchar(10))')
24 #如果习惯于每一个colmn单独一行，可以用'''代替'
25 >>> cur.execute('''create table user8(id varchar(10),
26 name varchar(10))''')
27 #查看表user,execute中的语句语法跟mysql中的一样
28 >>> cur.execute('select * from user')
29 >>> user_select_result=cur.fetchall()
30 >>> user_select_result
31 (('1', 'Michael'), ('11', 'ozil'), ('12', 'Giroud'), ('2', 'Henry'), ('Alexis', '17'), ('Ramsey', '16'), ('Walcott', '14'))
32 >>> cur.execute('select * from user')
33 #fetchone只获得第一条查询结果
34 >>> user_select_result=cur.fetchone()
35 >>> user_select_result
36 ('1', 'Michael')
37 >>> cur.execute('select * from user')
38 #fetchmany(n)，可以获得n条查询结果
39 >>> user_select_result=cur.fetchmany(4)
40 >>> user_select_result
41 (('1', 'Michael'), ('11', 'ozil'), ('12', 'Giroud'), ('2', 'Henry'))
42 #插入数据，注意插入语句的插入参数一定要是变量，不能是直接一个set
43 >>> insert_value=('3','gibbs')
44 >>> cur.execute('insert into user(id,name) values(%s,%s)',insert_value)
45 >>> cur.execute('select * from user')
46 >>> user_select_result=cur.fetchall()
47 >>> user_select_result
48 (('1', 'Michael'), ('11', 'ozil'), ('12', 'Giroud'), ('2', 'Henry'), ('3', 'gibbs'), ('Alexis', '17'), ('Ramsey', '16'), ('Walcott', '14'))
49 insert_value_list=[('22','debucy'),('33','cech')]
50 #插入多条数据，需要用executemany
51 >>> cur.executemany('insert into user(id,name) values(%s,%s)',insert_value_list)
52 >>> cur.execute('select * from user')
53 >>> user_select_result=cur.fetchall()
54 >>> user_select_result
55 (('1', 'Michael'), ('11', 'ozil'), ('12', 'Giroud'), ('2', 'Henry'), ('22', 'debucy'), ('3', 'gibbs'), ('33', 'cech'), ('Alexis', '17'), ('Ramsey', '16'), ('Walcott', '14'))
56 #只有conn.commit()后，对数据库的修改才会提交
57 >>> conn.commit()
58 >>> cur.execute('update user set name="Ozil" where id="11"')
59 >>> user_select_result=cur.fetchall()
60 >>> user_select_result
61 ()
62 >>> cur.execute('select * from user')
63 >>> user_select_result=cur.fetchall()
64 >>> user_select_result
65 (('1', 'Michael'), ('11', 'Ozil'), ('12', 'Giroud'), ('2', 'Henry'), ('22', 'debucy'), ('3', 'gibbs'), ('33', 'cech'), ('Alexis', '17'), ('Ramsey', '16'), ('Walcott', '14'))
66 #修改后一定要comiit，不然删除、更新、添加的数据都不会被写进数据库中。
67 >>> conn.commit()
68 #最后要把cur和conn都关掉
69 >>> cur.close()
70 >>> conn.close()