August 2022
Beginner to intermediate
436 pages
9h 43m
Korean
Content preview from SQL로 시작하는 데이터 분석
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241
5
장
텍스트 분석
[그림
5
-
2
]를 보면
sighting
_
report
필드에서 대부분의 레코드에 저장된 문자열의 길이는
150
~
180
개 글자이며,
140
개 글자보다 짧거나
200
개 글자보다 긴 문자열은 거의 없습니다.
같은 방법으로
description
필드에 저장된 문자열의 길이 분포를 확인해보면
5
~
64
,
921
개
글자입니다. 아직 제대로 프로파일링하지 않았는데도 글자 수만으로
description
필드에 아
주 다양한 값들이 저장돼 있다고 추측할 수 있습니다.
sighting
_
report
필드에 저장된 문자열의 길이 분포
레코드 수
문자열 길이
그림
5-2
ufo
테이블의
sighting
_
report
필드에 저장된 문자열의 길이 분포
sighting
_
report
필드에서 행 몇 개를 샘플로 가져와 확인해봅시다. 필드에 저장된 내용을
파악하기 위해 쿼리 도구에서 수백 개 행을 스크롤하며 확인한 결과, 아래와 같이
sighting
_
report
필드에 저장된 대표 값 세 개를 선정했습니다.
Occurred : 3/4/2018 19:07 (Entered as : 03/04/18 19:07)Reported: 3/6/2018 7:05:12 PM
19:05Posted: 3/8/2018Location: Colorado Springs, COShape: LightDuration:3 ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
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.