vnpy/vn.data/azure_mssql.py

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2015-10-07 16:27:06 +00:00
# encoding: UTF-8
#!/usr/bin/env python
#-------------------------------------------------------------------------------
# Name: azure_mssql.py
# Purpose: 使用 pymssql库链接Azure的MSSQL
#
# Author: IncenseLee@hotmail.com
#
# Created: 09/19/2015
#-------------------------------------------------------------------------------
import pymssql
class azure_mssql:
"""
对pymssql的简单封装
pymssql库该库到这里下载http://www.lfd.uci.edu/~gohlke/pythonlibs/#pymssql
使用该库时需要在Sql Server Configuration Manager里面将TCP/IP协议开启
http://pymssql.sourceforge.net/ref_pymssql.php
sql语句中有中文的时候进行encode
insertSql = "insert into WeiBo([UserId],[WeiBoContent],[PublishDate]) values(1,'测试','2012/2/1')".encode("utf8")
连接的时候加入charset设置信息
pymssql.connect(host=self.host,user=self.user,password=self.pwd,database=self.db,charset="utf8")
用法
"""
def __init__(self,host,user,pwd,db):
self.host = host
self.user = user
self.pwd = pwd
self.db = db
def __get_connect(self):
"""
得到连接信息
返回: conn.cursor()
"""
if not self.db:
raise(NameError,"没有设置数据库信息")
self.conn = pymssql.connect(host=self.host, user=self.user, password=self.pwd, database=self.db, charset="utf8")
cur = self.conn.cursor()
if not cur:
raise(NameError,"连接数据库失败")
else:
return cur
def exec_query(self,sql):
"""
执行查询语句
返回的是一个包含tuple的listlist的元素是记录行tuple的元素是每行记录的字段
调用示例
ms = azure_mssql(host="stock.database.windows.net",user="sqladmin",pwd="7uhb*IJN",db="stockcn")
resList = ms.ExecQuery("SELECT id,NickName FROM WeiBoUser")
for (id,NickName) in resList:
print str(id),NickName
"""
cur = self.__get_connect()
cur.execute(sql)
resList = cur.fetchall()
#查询完毕后必须关闭连接
self.conn.close()
return resList
def exec_non_query(self,sql):
"""
执行非查询语句
调用示例
cur = self.__GetConnect()
cur.execute(sql)
self.conn.commit()
self.conn.close()
"""
cur = self.__get_connect()
cur.execute(sql)
self.conn.commit()
self.conn.close()
def main():
## ms = azure_mssql(host="stock.database.windows.net",user="sqladmin",pwd="7uhb*IJN",db="stockcn")
## #返回的是一个包含tuple的listlist的元素是记录行tuple的元素是每行记录的字段
## ms.ExecNonQuery("insert into WeiBoUser values('2','3')")
ms = azure_mssql(host="stock.database.windows.net:1433", user="sqladmin", pwd="7uhb*IJN", db="stockcn")
resList = ms.exec_query("SELECT count(*) as recordcounts FROM tb_ami")
for (recordcounts) in resList:
print str(recrodcounts).decode("utf8")
if __name__ == '__main__':
main()