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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488 Chapter 11
다양한 데이터베이스 문제
‘DBcm’에 또 어떤 문제가 생길 수 있나요?
백엔드 데이터베이스가 제대로 동작하더라도 다른 문제가 생길 수 있습니다.
예를 들면 데이터베이스 접속에 사용하는 인증 정보가 잘못될 수 있습니다. 인증 정보가
올바르지 않으면
__
enter
__
메서드 실행이 다시 실패하면서
mysql
.
connector
.
errors
.
ProgramingError
가 발생합니다.
또는
UseDatabase
컨텍스트 관리자가 항상 제대로 동작한다는 보장은 없으므로
UseDatabase
컨텍스트 관리자에서 문제가 발생할 수 있습니다. 데이터베이스 질의문에
에러가 있을 때도
mysql
.
connector
.
errors
.
ProgramingError
가 발생합니다.
SQL
질의문의 에러는 인증 관련 에러와는 다른 메시지를 포함하지만
mysql
.
connector
.
errors
.
ProgramingError
라는 같은 종류의 에러를 발생시킵니다. 인증 관련 에러와
달리
SQL
에러는
with
문을 실행하는 도중에 발생합니다. 즉,
SQL
이 사용되는 여러
장소에서 이 에러가 발생할 수 있다는 의미입니다. 그럼
‘
여러 장소에서 발생하는 에러로부터
코드를 보호하려면 관련 코드를 어디에 추가해야 할까?
’
라는 질문이 생깁니다.
다음
DBcm
코드를 다시 검토하 ...
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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.
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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.