python django 原生sql 获取数据的例子

如下所示：

node2:/django/mysite/blog#cat views.py
1,

# -*- coding: utf-8 -*-
from __future__ import unicode_literals
# from django.shortcuts import render, render_to_response
from .models import *
# Create your views here.
from django.http import HttpResponse
from django.template import loader
import MySQLdb

def query():
 conn= MySQLdb.connect(
   host='localhost',
   port = 3306,
   user='root',
   passwd='1234567',
   db ='tlcb',
   )
 cur = conn.cursor()
 a=cur.execute("select title,body, DATE_FORMAT(timestamp,'％Y~％m~％d ％k.％i.％s') A from blog_blogpost")
 info = cur.fetchall()
 return info
 cur.close()
 conn.close()

def archive(req):
print 'aaaaaaaaaaaaaaaaaaaaaaaaaaa'
print req
print type(req)
print req.GET
print '#############################'
print req.GET['aa']
print req.GET['cc']
print '#############################'
print 'aaaaaaaaaaaaaaaaaaaaaaaaaaa'
# get all blogpost objects
posts =query()
print posts
print type(posts)
#print blog_list
template = loader.get_template('archive.html')
context = {
'posts':posts
}
print '------------------------------------------'
print HttpResponse(template.render(context, req))
print '------------------------------------------'
return HttpResponse(template.render(context, req))
node2:/django/mysite/blog#

node2:/django/mysite/blog/templates#vi archive.html
node2:/django/mysite/blog/templates#
node2:/django/mysite/blog/templates#
node2:/django/mysite/blog/templates#
node2:/django/mysite/blog/templates#cat archive.html
{％ extends "base.html" ％}
{％ block content ％}
  {％ for post in posts ％}
  <h2>{{ post.0 }}</h2>
  <p>{{ post.1 | date:"1,F jS"}}</p>
  <p>{{ post.2 }}</p>
  {％ endfor ％}
{％ endblock ％}

(('dd', 'ddd', '2017~11~24 8.31.42'), ('66666666', '66666', '2017~11~24 8.35.25'), ('777777777', '77777777777', '2017~11~27 1.46.15'))
<type 'tuple'>

在自定义 model 方法和模块级方法里,你可以自由的执行自定义SQL语句. 对象 django.db.connection 表示当前的数据库连接. 调用connection.cursor() 得到一个游标对象. 然后调用 cursor.execute(sql, [params])``以执行 SQL 语句, 使用 ``cursor.fetchone() 或cursor.fetchall() 得到结果集. 下面是一个例子:
def my_custom_sql(self):
 from django.db import connection
 cursor = connection.cursor()
 cursor.execute("SELECT foo FROM bar WHERE baz = ％s", [self.baz])
 row = cursor.fetchone()
 return row

如果你的SQL语句改变了数据库中的数据 -- 比如你使用了 DELETE 或 UPDATE 语句. 你需要调用 connection.commit() 来使你的修改生效.
例子:
def my_custom_sql2(self):
 from django.db import connection
 cursor = connection.cursor()
 cursor.execute("DELETE FROM bar WHERE baz = ％s", [self.baz])
 connection.commit()

来源：https://blog.csdn.net/zhaoyangjian724/article/details/78657346