Python安装MySQL数据库模块,python操作MySQL数据库

背景

折腾:

【记录】使用Python操作MySQL数据库

的过程中,需要去安装MySQLdb。

下载MySQLdb

去官网:

http://pypi.python.org/pypi/MySQL-python/

看到有1.2.4和1.2.3

所以去最新的1.2.4:

http://pypi.python.org/pypi/MySQL-python/1.2.4

下载对应的编译好的版本:

MySQL-python-1.2.4.win32-py2.7.exe

得到1MB的

MySQL-python-1.2.4.win32-py2.7.exe

安装MySQLdb

双击安装:

 《Python安装MySQL数据库模块,python操作MySQL数据库》

结果出错:

《Python安装MySQL数据库模块,python操作MySQL数据库》

看来此x86的exe,是不支持我的win7 x64。

所以只能去下载源码再去安装了。

下载源码:

MySQL-python-1.2.4.zip

然后再去解压和安装,结果果然出现

error: Unable to find vcvarsall.bat

的错误:

D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4>setup.py install           
Downloading http://pypi.python.org/packages/source/d/distribute/distribute-0.6.28.tar.gz             
Extracting in c:\users\cli\appdata\local\temp\tmpkapo0l             
Now working in c:\users\cli\appdata\local\temp\tmpkapo0l\distribute-0.6.28             
Building a Distribute egg in D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4             
D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4\distribute-0.6.28-py2.7.egg             
running install             
running bdist_egg             
running egg_info             
writing MySQL_python.egg-info\PKG-INFO             
writing top-level names to MySQL_python.egg-info\top_level.txt             
writing dependency_links to MySQL_python.egg-info\dependency_links.txt             
writing MySQL_python.egg-info\PKG-INFO             
writing top-level names to MySQL_python.egg-info\top_level.txt             
writing dependency_links to MySQL_python.egg-info\dependency_links.txt             
reading manifest file ‘MySQL_python.egg-info\SOURCES.txt’             
reading manifest template ‘MANIFEST.in’             
writing manifest file ‘MySQL_python.egg-info\SOURCES.txt’             
installing library code to build\bdist.win-amd64\egg             
running install_lib             
running build_py             
creating build             
creating build\lib.win-amd64-2.7             
copying _mysql_exceptions.py -> build\lib.win-amd64-2.7             
creating build\lib.win-amd64-2.7\MySQLdb             
copying MySQLdb\__init__.py -> build\lib.win-amd64-2.7\MySQLdb             
copying MySQLdb\converters.py -> build\lib.win-amd64-2.7\MySQLdb             
copying MySQLdb\connections.py -> build\lib.win-amd64-2.7\MySQLdb             
copying MySQLdb\cursors.py -> build\lib.win-amd64-2.7\MySQLdb             
copying MySQLdb\release.py -> build\lib.win-amd64-2.7\MySQLdb             
copying MySQLdb\times.py -> build\lib.win-amd64-2.7\MySQLdb             
creating build\lib.win-amd64-2.7\MySQLdb\constants             
copying MySQLdb\constants\__init__.py -> build\lib.win-amd64-2.7\MySQLdb\constants             
copying MySQLdb\constants\CR.py -> build\lib.win-amd64-2.7\MySQLdb\constants            
copying MySQLdb\constants\FIELD_TYPE.py -> build\lib.win-amd64-2.7\MySQLdb\constants             
copying MySQLdb\constants\ER.py -> build\lib.win-amd64-2.7\MySQLdb\constants            
copying MySQLdb\constants\FLAG.py -> build\lib.win-amd64-2.7\MySQLdb\constants             
copying MySQLdb\constants\REFRESH.py -> build\lib.win-amd64-2.7\MySQLdb\constants             
copying MySQLdb\constants\CLIENT.py -> build\lib.win-amd64-2.7\MySQLdb\constants             
running build_ext             
building ‘_mysql’ extension             
error: Unable to find vcvarsall.bat

D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4>

然后参考之前的办法,结果还是出错:

D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4>SET VS90COMNTOOLS=%VS100COMNTOOLS%

D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4>setup.py install           
running install             
running bdist_egg             
running egg_info             
writing MySQL_python.egg-info\PKG-INFO             
writing top-level names to MySQL_python.egg-info\top_level.txt             
writing dependency_links to MySQL_python.egg-info\dependency_links.txt             
writing MySQL_python.egg-info\PKG-INFO             
writing top-level names to MySQL_python.egg-info\top_level.txt             
writing dependency_links to MySQL_python.egg-info\dependency_links.txt             
reading manifest file ‘MySQL_python.egg-info\SOURCES.txt’             
reading manifest template ‘MANIFEST.in’             
writing manifest file ‘MySQL_python.egg-info\SOURCES.txt’             
installing library code to build\bdist.win-amd64\egg             
running install_lib             
running build_py             
copying MySQLdb\release.py -> build\lib.win-amd64-2.7\MySQLdb             
running build_ext             
building ‘_mysql’ extension             
creating build\temp.win-amd64-2.7             
creating build\temp.win-amd64-2.7\Release             
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -Dversion_info=(1,2,4,’final’,1) -D__version__=1.2.4 “-IC:\Program Files (x86)\MySQL\MySQL             
Connector C 6.0.2\include” -ID:\tmp\dev_install_root\Python27_x64\include -ID:\tmp\dev_install_root\Python27_x64\PC /Tc_mysql.c /Fobuild\temp.win-amd64-2.7\Release\_mysql.obj /Zl             
_mysql.c             
_mysql.c(42) : fatal error C1083: Cannot open include file: ‘config-win.h’: No such file or directory             
error: command ‘”C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\cl.exe”’ failed with exit status 2

D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4>  

然后再参考:

Windows下安装MySQLdb遇到的问题及解决方法

所说的:

1)问题 : _mysql.c(34) : fatal error C1083: Cannot open include file: ‘config-win.h’: No such file or directory       
error: command ‘”C:/Program Files/Microsoft Visual Studio 9.0/VC/BIN/cl.exe”‘ failed with exit status 2

原因 :原因是安装MySQL的时候没有安装C语言库。

解决 :重新运行MySQL的安装程序,选择Modify,把“C Include Files / Lib Files”勾选上,并安装。

去重新安装mysql。

 

 

继续:

【记录】为Python安装MySQL数据库模块:MySQLdb

的折腾:

1.参考:

MySQL-python 1.2.3 for Windows and Python 2.7, 32bit and 64bit versions

得知:

python的

此处的要安装x64还是x86,是取决于你所安装的Python的版本,而不是OS的版本。

所以此处去x64 win7中的cmd中确认一下python的版本:

C:\Users\CLi>python 
Python 2.7.3 (default, Apr 10 2012, 23:24:47) [MSC v.1500 64 bit (AMD64)] on win32 
Type “help”, “copyright”, “credits” or “license” for more information. 
>>>

的确是x64的,所以的确要安装的是x64。

2.下载对应的:

MySQL-python-1.2.3.win-amd64-py2.7.exe (1.0 MiB)

结果链接失效:“File does not exist.”

3.从:

http://www.codegood.com/downloads

找到一堆的下载,但是结果都失效了。

4.参考:

Python: How to install mysqldb on windows 7 x64?

结果最后找到的下载地址也是上面的那个失效的地址。

5.还是参考:

Install MySQLdb for Python 2.6 in Windows 7 64-bit

python MySQLdb在windows环境下的快速安装、问题解决方式

去自己编译吧。

6.然后还是同样错误:

D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4>SET VS90COMNTOOLS=%VS100COMNTOOLS%

D:\tmp\dev_tools\python\mysql\MySQL-python-1.2.4\MySQL-python-1.2.4>setup.py install
running install 
running bdist_egg 
running egg_info 
writing MySQL_python.egg-info\PKG-INFO 
writing top-level names to MySQL_python.egg-info\top_level.txt 
writing dependency_links to MySQL_python.egg-info\dependency_links.txt 
writing MySQL_python.egg-info\PKG-INFO 
writing top-level names to MySQL_python.egg-info\top_level.txt 
writing dependency_links to MySQL_python.egg-info\dependency_links.txt 
reading manifest file ‘MySQL_python.egg-info\SOURCES.txt’ 
reading manifest template ‘MANIFEST.in’ 
writing manifest file ‘MySQL_python.egg-info\SOURCES.txt’ 
installing library code to build\bdist.win-amd64\egg 
running install_lib 
running build_py 
copying MySQLdb\release.py -> build\lib.win-amd64-2.7\MySQLdb 
running build_ext 
building ‘_mysql’ extension 
C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\cl.exe /c /nologo /Ox /MD /W3 /GS- /DNDEBUG -Dversion_info=(1,2,4,’final’,1) -D__version__=1.2.4 “-IC:\Program File 
s (x86)\MySQL\MySQL Connector C 6.0.2\include” -ID:\tmp\dev_install_root\Python27_x64\include -ID:\tmp\dev_install_root\Python27_x64\PC /Tc_mysql.c /Fobuild\temp.win-amd64-2.7\Rele 
ase\_mysql.obj /Zl 
_mysql.c 
_mysql.c(42) : fatal error C1083: Cannot open include file: ‘config-win.h’: No such file or directory 
error: command ‘”C:\Program Files (x86)\Microsoft Visual Studio 10.0\VC\BIN\amd64\cl.exe”’ failed with exit status 2

然后参考:

Install Python-MySql on Windows 7 64-bit

看到了site.cfg内容是:

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 [options] # embedded: link against the embedded server library # threadsafe: use the threadsafe client # static: link against a static library (probably required for embedded)   embedded = False threadsafe = True static = False   # The path to mysql_config. # Only use this if mysql_config is not on your PATH, or you have some weird # setup that requires it. #mysql_config = /usr/local/bin/mysql_config   # http://stackoverflow.com/questions/1972259/mysql-python-install-problem-using-virtualenv-windows-pip # Windows connector libs for MySQL. You need a 32-bit connector for your 32-bit Python build. connector = C:\Program Files (x86)\MySQL\MySQL Connector C 6.0.2

然后注意到了,上面的编译过程中的include的路径,就是此处的connector的值。

7.又在这里:

Unofficial Windows Binaries for Python Extension Packages

找到了一个已编译的版本的下载地址:

MySQL-python-1.2.3.win-amd64-py2.7.exe [1.1 Mb] [Python 2.7] [64 bit] [JUN 08, 2011]

然后去安装:

《Python安装MySQL数据库模块,python操作MySQL数据库》

《Python安装MySQL数据库模块,python操作MySQL数据库》

《Python安装MySQL数据库模块,python操作MySQL数据库》

《Python安装MySQL数据库模块,python操作MySQL数据库》

然后就可以写代码去测试是否工作了。

在Python中使用MySQLdb操作MySQL数据库

参考:

python操作MySQL数据库

然后用:

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 #!/usr/bin/python # -*- coding: utf-8 -*- """ ------------------------------------------------------------------------------- Function: 【记录】为Python安装MySQL数据库模块:MySQLdb http://www.crifan.com/python_install_module_mysql_mysqldb/   Autor:  Crifan Li Date:   2013-04-22   ------------------------------------------------------------------------------- """   #---------------------------------import--------------------------------------- import MySQLdb   def python_mysql_test():      """      try to use mysql in python      """        try :          conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'xxx' ,db = 'wordpress' ,port = 3306 )          print "conn=" ,conn;          cur = conn.cursor()          print "cur=" ,cur;          cur.execute( 'select * from wp_users' )          cur.close()          conn.close()      except MySQLdb.Error,e:           print "Mysql Error %d: %s" % (e.args[ 0 ], e.args[ 1 ])   ############################################################################### if __name__ = = "__main__" :      python_mysql_test();

可以显示连接成功了:

D:\tmp\tmp_dev_root\python\tutorial_summary\python_mysql_test>python_mysql_test.py

conn= <_mysql.connection open to ‘localhost’ at 2a46ad8>

cur= <MySQLdb.cursors.Cursor object at 0x0000000002A54C50>

对应的wordpress的数据库是:

《Python安装MySQL数据库模块,python操作MySQL数据库》

9.再去折腾新建数据项试试:

?

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 #!/usr/bin/python # -*- coding: utf-8 -*- """ ------------------------------------------------------------------------------- Function: 【记录】为Python安装MySQL数据库模块:MySQLdb http://www.crifan.com/python_install_module_mysql_mysqldb/   Autor:  Crifan Li Date:   2013-04-22   ------------------------------------------------------------------------------- """   #---------------------------------import--------------------------------------- import MySQLdb   def python_mysql_test():      """      try to use mysql in python      """        try :          conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'xxx' ,db = 'test' ,port = 3306 , charset = 'utf8' )          print "conn=" ,conn;          cur = conn.cursor()          print "cur=" ,cur;            createdDb = cur.execute( 'create database if not exists pythonMysql' )          print "createdDb=" ,createdDb;          selectedDb = conn.select_db( 'pythonMysql' )          print "selectedDb=" ,selectedDb;          createdTable = cur.execute( 'create table test(id int,info varchar(20))' )          print "createdTable=" ,createdTable;                    value = [ 1 , 'hi rollen' ]          insertedValue = cur.execute( 'insert into test values(%s,%s)' ,value)          print "insertedValue=" ,insertedValue;                    values = []          for i in range ( 20 ):              values.append((i, 'hi rollen' + str (i)))                         insertedValues = cur.executemany( 'insert into test values(%s,%s)' ,values)          print "insertedValues=" ,insertedValues;                 updatedInfo = cur.execute( 'update test set info="I am rollen" where id=3' )          print "updatedInfo=" ,updatedInfo;                 committed = conn.commit()          print "committed=" ,committed;                    closedCur = cur.close()          print "closedCur=" ,closedCur;          closedConn = conn.close()          print "closedConn=" ,closedConn;            except MySQLdb.Error,e:           print "Mysql Error %d: %s" % (e.args[ 0 ], e.args[ 1 ])   ############################################################################### if __name__ = = "__main__" :      python_mysql_test();

结果如下:

D:\tmp\tmp_dev_root\python\tutorial_summary\python_mysql_test>python_mysql_test.py

conn= <_mysql.connection open to ‘localhost’ at 2a46ad8>

cur= <MySQLdb.cursors.Cursor object at 0x0000000002A54C50>

D:\tmp\tmp_dev_root\python\tutorial_summary\python_mysql_test>python_mysql_test.py

conn= <_mysql.connection open to ‘localhost’ at 2be06a8>

cur= <MySQLdb.cursors.Cursor object at 0x00000000028B7BE0>

createdDb= 1

selectedDb= None

createdTable= 0

insertedValue= 1

insertedValues= 20

updatedInfo= 1

committed= None

closedCur= None

closedConn= None

数据库中去看看结果:

《Python安装MySQL数据库模块,python操作MySQL数据库》

《Python安装MySQL数据库模块,python操作MySQL数据库》

都是可以正常工作的。

至此,简单的操作,到此结束。

以后就是针对要操作的数据,如何导入数据库,如何操作数据库了。

 

数据库操作:

python操作MySQL数据库

 

坚持每天学一点,每天积累一点点,作为自己每天的业余收获,这个文章是我在吃饭的期间写的,利用自己零散的时间学了一下python操作MYSQL,所以整理一下。

我采用的是MySQLdb操作的MYSQL数据库。先来一个简单的例子吧:

1 2 3 4 5 6 7 8 9 10 import  MySQLdb   try :      conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'root' ,db = 'test' ,port = 3306 )      cur = conn.cursor()      cur.execute( 'select * from user' )      cur.close()      conn.close() except  MySQLdb.Error,e:       print  "Mysql Error %d: %s"  %  (e.args[ 0 ], e.args[ 1 ])

  请注意修改你的数据库,主机名,用户名,密码。

下面来大致演示一下插入数据,批量插入数据,更新数据的例子吧:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 import  MySQLdb   try :      conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'root' ,port = 3306 )      cur = conn.cursor()            cur.execute( 'create database if not exists python' )      conn.select_db( 'python' )      cur.execute( 'create table test(id int,info varchar(20))' )            value = [ 1 , 'hi rollen' ]      cur.execute( 'insert into test values(%s,%s)' ,value)            values = []      for  in  range ( 20 ):          values.append((i, 'hi rollen' + str (i)))                cur.executemany( 'insert into test values(%s,%s)' ,values)        cur.execute( 'update test set info="I am rollen" where id=3' )        conn.commit()      cur.close()      conn.close()   except  MySQLdb.Error,e:       print  "Mysql Error %d: %s"  %  (e.args[ 0 ], e.args[ 1 ])

  请注意一定要有conn.commit()这句来提交事务要不然不能真正的插入数据。

运行之后我的MySQL数据库的结果就不上图了。

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 import  MySQLdb   try :      conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'root' ,port = 3306 )      cur = conn.cursor()            conn.select_db( 'python' )        count = cur.execute( 'select * from test' )      print  'there has %s rows record'  %  count        result = cur.fetchone()      print  result      print  'ID: %s info %s'  %  result        results = cur.fetchmany( 5 )      for  in  results:          print  r        print  '==' * 10      cur.scroll( 0 ,mode = 'absolute' )        results = cur.fetchall()      for  in  results:          print  r[ 1 ]              conn.commit()      cur.close()      conn.close()   except  MySQLdb.Error,e:       print  "Mysql Error %d: %s"  %  (e.args[ 0 ], e.args[ 1 ])

  运行结果就不贴了,太长了。

查询后中文会正确显示,但在数据库中却是乱码的。经过我从网上查找,发现用一个属性有可搞定:

在Python代码 

conn = MySQLdb.Connect(host=’localhost’, user=’root’, passwd=’root’, db=’python’) 中加一个属性:
 改为:
conn = MySQLdb.Connect(host=’localhost’, user=’root’, passwd=’root’, db=’python’,charset=’utf8′) 
charset是要跟你数据库的编码一样,如果是数据库是gb2312 ,则写charset=’gb2312’。

 

下面贴一下常用的函数:

然后,这个连接对象也提供了对事务操作的支持,标准的方法
commit() 提交
rollback() 回滚

cursor用来执行命令的方法:
callproc(self, procname, args):用来执行存储过程,接收的参数为存储过程名和参数列表,返回值为受影响的行数
execute(self, query, args):执行单条sql语句,接收的参数为sql语句本身和使用的参数列表,返回值为受影响的行数
executemany(self, query, args):执行单挑sql语句,但是重复执行参数列表里的参数,返回值为受影响的行数
nextset(self):移动到下一个结果集

cursor用来接收返回值的方法:
fetchall(self):接收全部的返回结果行.
fetchmany(self, size=None):接收size条返回结果行.如果size的值大于返回的结果行的数量,则会返回cursor.arraysize条数据.
fetchone(self):返回一条结果行.
scroll(self, value, mode=’relative’):移动指针到某一行.如果mode=’relative’,则表示从当前所在行移动value条,如果 mode=’absolute’,则表示从结果集的第一行移动value条.

 

,

坚持每天学一点,每天积累一点点,作为自己每天的业余收获,这个文章是我在吃饭的期间写的,利用自己零散的时间学了一下python操作MYSQL,所以整理一下。

我采用的是MySQLdb操作的MYSQL数据库。先来一个简单的例子吧:

1 2 3 4 5 6 7 8 9 10 import  MySQLdb   try :      conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'root' ,db = 'test' ,port = 3306 )      cur = conn.cursor()      cur.execute( 'select * from user' )      cur.close()      conn.close() except  MySQLdb.Error,e:       print  "Mysql Error %d: %s"  %  (e.args[ 0 ], e.args[ 1 ])

  请注意修改你的数据库,主机名,用户名,密码。

下面来大致演示一下插入数据,批量插入数据,更新数据的例子吧:

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 import  MySQLdb   try :      conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'root' ,port = 3306 )      cur = conn.cursor()            cur.execute( 'create database if not exists python' )      conn.select_db( 'python' )      cur.execute( 'create table test(id int,info varchar(20))' )            value = [ 1 , 'hi rollen' ]      cur.execute( 'insert into test values(%s,%s)' ,value)            values = []      for  in  range ( 20 ):          values.append((i, 'hi rollen' + str (i)))                cur.executemany( 'insert into test values(%s,%s)' ,values)        cur.execute( 'update test set info="I am rollen" where id=3' )        conn.commit()      cur.close()      conn.close()   except  MySQLdb.Error,e:       print  "Mysql Error %d: %s"  %  (e.args[ 0 ], e.args[ 1 ])

  请注意一定要有conn.commit()这句来提交事务要不然不能真正的插入数据。

运行之后我的MySQL数据库的结果就不上图了。

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 import  MySQLdb   try :      conn = MySQLdb.connect(host = 'localhost' ,user = 'root' ,passwd = 'root' ,port = 3306 )      cur = conn.cursor()            conn.select_db( 'python' )        count = cur.execute( 'select * from test' )      print  'there has %s rows record'  %  count        result = cur.fetchone()      print  result      print  'ID: %s info %s'  %  result        results = cur.fetchmany( 5 )      for  in  results:          print  r        print  '==' * 10      cur.scroll( 0 ,mode = 'absolute' )        results = cur.fetchall()      for  in  results:          print  r[ 1 ]              conn.commit()      cur.close()      conn.close()   except  MySQLdb.Error,e:       print  "Mysql Error %d: %s"  %  (e.args[ 0 ], e.args[ 1 ])

  运行结果就不贴了,太长了。

查询后中文会正确显示,但在数据库中却是乱码的。经过我从网上查找,发现用一个属性有可搞定:

在Python代码 

conn = MySQLdb.Connect(host=’localhost’, user=’root’, passwd=’root’, db=’python’) 中加一个属性:
 改为:
conn = MySQLdb.Connect(host=’localhost’, user=’root’, passwd=’root’, db=’python’,charset=’utf8′) 
charset是要跟你数据库的编码一样,如果是数据库是gb2312 ,则写charset=’gb2312’。

 

下面贴一下常用的函数:

然后,这个连接对象也提供了对事务操作的支持,标准的方法
commit() 提交
rollback() 回滚

cursor用来执行命令的方法:
callproc(self, procname, args):用来执行存储过程,接收的参数为存储过程名和参数列表,返回值为受影响的行数
execute(self, query, args):执行单条sql语句,接收的参数为sql语句本身和使用的参数列表,返回值为受影响的行数
executemany(self, query, args):执行单挑sql语句,但是重复执行参数列表里的参数,返回值为受影响的行数
nextset(self):移动到下一个结果集

cursor用来接收返回值的方法:
fetchall(self):接收全部的返回结果行.
fetchmany(self, size=None):接收size条返回结果行.如果size的值大于返回的结果行的数量,则会返回cursor.arraysize条数据.
fetchone(self):返回一条结果行.
scroll(self, value, mode=’relative’):移动指针到某一行.如果mode=’relative’,则表示从当前所在行移动value条,如果 mode=’absolute’,则表示从结果集的第一行移动value条.

 

    原文作者:淡漠一生,何欲何求
    原文地址: https://www.cnblogs.com/mrdz/p/6021739.html
    本文转自网络文章,转载此文章仅为分享知识,如有侵权,请联系博主进行删除。
点赞