python连接sql server

Posted 2021-09-13 Gendan

具体连接、测试代码：

server默认为127.0.0.1，如果打开了TCP动态端口的需要加上端口号，如\'127.0.0.1:1433\'

user默认为sa

password为自己设置的密码

database为数据库名字

server = \'127.0.0.1\'
user = "sa"
password = "123456"
database = "pubs"
conn = pymssql.connect(server, user, password, database)

可简化为conn = pymssql.connect(host=\'localhost\', user=\'sa\', password=\'123456\', database=\'pubs\')

cursor = conn.cursor()
cursor.execute(\'SELECT * FROM titles\')
print( cursor.fetchall() )

如果用pandas读取数据库

import pymssql
import pandas as pd
conn = pymssql.connect(\'IP地址\',\'账号\',\'密码\',\'数据库\')
sql_1 = "SELECT Id,creat_time from 表名"

利用pandas直接获取数据"

data = pd.read_sql(sql_1, conn)
conn.close()
print(data)
封装好的版本：

coding=utf-8

sqlserver的连接

import pymssql
class MSSQL:

def __init__(self,host,user,pwd,db):
    self.host = host
    self.user = user
    self.pwd = pwd
    self.db = db
def __GetConnect(self):
    """
    得到连接信息
    返回: conn.cursor()
    """
    if not self.db:
        raise(NameError,[贝宝](https://www.gendan5.com/wallet/PayPal.html)"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 ExecQuery(self,sql):
    """
    执行查询语句
    返回的是一个包含tuple的list，list的元素是记录行，tuple的元素是每行记录的字段
    """
    cur = self.__GetConnect()
    cur.execute(sql)
    resList = cur.fetchall()
    #查询完毕后必须关闭连接
    self.conn.close()
    return resList
def ExecNonQuery(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.__GetConnect()
    cur.execute(sql)
    self.conn.commit()
    self.conn.close()

def main():

# host默认为127.0.0.1，如果打开了TCP动态端口的需要加上端口号，如\'127.0.0.1:1433\'
# user默认为sa
# pwd为自己设置的密码
# db为数据库名字
ms = MSSQL(host=\'127.0.0.1\',user="sa",pwd="123456",db="pubs")
resList = ms.ExecQuery("SELECT * FROM titles")
print(resList)

if name == \'__main__\':

main()