August 2022
Beginner to intermediate
436 pages
9h 43m
Korean
Content preview from SQL로 시작하는 데이터 분석
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
115
3
장
시계열 분석
1992 2014102
1993 2153095
1994 2330235
... ...
이 데이터를 그래프로 나타내면 [그림
3
-
3
]과 같습니다. 예상대로 시간이 흐를수록 매출이 증
가하는 추세를 보입니다. 매출이 연도별로 합산되면서 월별 물가 변동에 영향을 받지 않아 더
부드러운 시계열 그래프가 완성됐습니다.
2009
년에 소매업 및 외식업 매출이 떨어진 이유는
세계 금융 위기 때문입니다.
2010
년부터는 매년 매출이 성장하며,
2020
년에 이르러서는 코로
나
19
로 인해
2019
년과 비슷한 수준으로 유지됩니다.
소매업과 외식업의 연간 매출
매출(백만)
연도
그림
3-3
소매업과 외식업의 연간 매출 트렌드
116
SQL로 시작하는 데이터 분석
주간, 월간, 연간 등 각기 다른 단위를 사용해 시계열 데이터로 그래프를 그려보면 트렌드를 이
해하기에 아주 좋습니다. 이 단계는 분석 목적에 따라 간단하게 데이터를 프로파일링하는 수단
이 되기도 하고, 그 자체로 최종 분석 결과물이 되기도 합니다. 이제
SQL
을 활용한 요소별 트
렌드 비교 분석을 알아봅시다.
3.3.2
요소 비교
데이터셋이 ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.