Django 直接执行sql语句的使用方法 Performing raw SQL queries

开始展示的前提是，看一下表的结构

class Person(models.Model):
    first_name = models.CharField(...)
    last_name = models.CharField(...)
    birth_date = models.DateField(...)

1，Performing raw SQL queries

你可以直接执行一个语句像这样

for p in Person.objects.raw('SELECT * FROM myapp_person'):
    print(p)

官方提示不要使用下面这种方式

lname = 'Doe'
query = 'SELECT * FROM myapp_person WHERE last_name = %s' % lname
Person.objects.raw(query)

2，Executing custom SQL directly

Sometimes even Manager.raw() isn’t quite enough: you might need to perform queries that don’t map cleanly to models, or directly execute UPDATE, INSERT, or DELETE queries.

是的，有时候Raw Sql Queries是满足不了我们的需求的，那么我们就直接执行一下好了。

cursor = connection.cursor()
cursor.execute("UPDATE myapp_person SET first_name = 1 WHERE first_name = %s", [self.bar])
cursor.execute("SELECT `last_name` FROM myapp_person WHERE last_name = %s", [self.baz])
row = cursor.fetchone()
print_r(row)

还不错，需求挺大，满足也挺大，操作也简便，对项目的操作很便利