如何在没有 ORM 的情况下用 python 编写 SQL？

Question

I am connecting to a PostgreSQL database with python using os.Popen(cmd). How can I an write the SQL statement without using an ORM?

Answer 1

Use psql to issue your statements to the database via the pipe.

sql = "SELECT firstname,lastname from users"
cmd = "psql -c '" + sql + ";' -d dbname -U user"  

result = os.popen(cmd, 'r', 1)
print(result)

You need to know the database schema (tables, columns, etc) ahead of time to do this. You also need to be careful about SQL injection.