December 2017
Beginner
624 pages
15h 38m
Korean
Content preview from Head First Python, 개정판 : 스스로 질문하며 답을 찾는 파이썬 학습서(Python 3)
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504 Chapter 11¾
insert는 select가 아니에요
데이터베이스 INSERT와 SELECT는 다릅니다
위 제목을 보고
‘
물론 다르지
’
라고 생각하셨다면 아직까지 우리 두뇌가 제 기능을 하고 있다는
좋은 증거입니다.
그렇습니다.
SQL
INSERT
는
SQL
SELECT
와 다릅니다. 하지만 두 질의를 우리 웹앱에서
어떻게 사용하느냐는 중요합니다.
log
_
request
의
INSERT
는 블록을 하는 코드가 필요
없지만
view
_
the
_
log
의
SELECT
질의는 상황이 많이 다릅니다.
이는 중요한 점이에요.
view
_
the
_
log
의
SELECT
가 백엔드 데이터베이스에서 데이터를 반환할 때까지 기다리지
않는다면
cursor
.
execute
나머지 코드 실행에서 사용할 데이터가 없으므로 문제가
일어납니다.
view
_
the
_
log
함수는 처리할 데이터를 가져올 때까지 반드시 블록해야 합니다.
웹앱에서 현재 웹 요청과 관련한 자세한 정보를 데이터베이스에 기록하길 원할 때
log
_
request
를 호출합니다. 호출 코드는 이 작업이 언제 일어나는지에 크게 관심이 없습니다.
log
_
request
함수는 반환값이나 데이터가 없습니다. 호출 코드는 응답을 기다리지 않죠.
모든 호출 코드가 신경 쓰는 부분은 웹 요청이 순서대로 잘 저장되는가 하는 점입니다.
여기서 ...
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.