Growth ๐ŸŒณ/Practice ๐Ÿ’ป 118

[LeetCode] 1179. Reformat Department Table

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ๋ฆฌํŠธ์ฝ”๋“œ Problems, https://leetcode.com/problemset/all/ ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://leetcode.com/problems/reformat-department-table/ Reformat Department Table - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com Table: Department +-------------+---------+ | Column N..

[LeetCode] 262. Trips and Users

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ๋ฆฌํŠธ์ฝ”๋“œ Problems, https://leetcode.com/problemset/all/ ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://leetcode.com/problems/department-highest-salary/ Department Highest Salary - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com โ–  ํ’€์ด The cancellation rate is computed by dividing the..

[Programmers] ์šฐ์œ ์™€ ์š”๊ฑฐํŠธ๊ฐ€ ๋‹ด๊ธด ์žฅ๋ฐ”๊ตฌ๋‹ˆ

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋”ฉ ํ…Œ์ŠคํŠธ ์—ฐ์Šต, https://school.programmers.co.kr/learn/challenges ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. ์œ„ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต์— ๊ณต๊ฐœ๋œ ๋ฌธ์ œ๋Š” (์ฃผ)๊ทธ๋ ™์ด ์ €์ž‘๊ถŒ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://school.programmers.co.kr/learn/courses/30/lessons/62284 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”. programmers.co.kr โ–  ํ’€์ด ๋ฌธ์ œ ์š”๊ตฌ์‚ฌํ•ญ ๋ฐ์ดํ„ฐ ๋ถ„์„ ํŒ€์—์„œ๋Š” ์šฐ์œ (Milk)์™€ ์š”๊ฑฐํŠธ(Yogurt)๋ฅผ ๋™์‹œ์— ๊ตฌ์ž…ํ•œ ์žฅ๋ฐ”๊ตฌ๋‹ˆ๊ฐ€ ์žˆ๋Š”์ง€ ์•Œ์•„๋ณด๋ ค..

[Programmers] ์ž…์–‘ ์‹œ๊ฐ ๊ตฌํ•˜๊ธฐ(2)

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋”ฉ ํ…Œ์ŠคํŠธ ์—ฐ์Šต, https://school.programmers.co.kr/learn/challenges ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. ์œ„ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต์— ๊ณต๊ฐœ๋œ ๋ฌธ์ œ๋Š” (์ฃผ)๊ทธ๋ ™์ด ์ €์ž‘๊ถŒ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://school.programmers.co.kr/learn/courses/30/lessons/59413 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”. programmers.co.kr โ–  ํ’€์ด WITH RECURSIVE cte AS ( SELECT 0 AS n UNION ALL SELECT n + 1 FROM..

[LeetCode] 184. Department Highest Salary

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ๋ฆฌํŠธ์ฝ”๋“œ Problems, https://leetcode.com/problemset/all/ ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://leetcode.com/problems/department-highest-salary/ Department Highest Salary - LeetCode Level up your coding skills and quickly land a job. This is the best place to expand your knowledge and get prepared for your next interview. leetcode.com โ–  ํ’€์ด Employee ํ…Œ์ด๋ธ” (id, name, salary, deparment)Departm..

[Programmers] ์˜ค๋žœ ๊ธฐ๊ฐ„ ๋ณดํ˜ธํ•œ ๋™๋ฌผ(2)

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋”ฉ ํ…Œ์ŠคํŠธ ์—ฐ์Šต, https://school.programmers.co.kr/learn/challenges ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. ์œ„ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต์— ๊ณต๊ฐœ๋œ ๋ฌธ์ œ๋Š” (์ฃผ)๊ทธ๋ ™์ด ์ €์ž‘๊ถŒ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://school.programmers.co.kr/learn/courses/30/lessons/59411 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”. programmers.co.kr โ–  ํ’€์ด SELECT INS.ANIMAL_ID, INS.NAME FROM ANIMAL_INS INS JOIN ANIMAL_OU..

[Programmers] ์ค‘์„ฑํ™” ์—ฌ๋ถ€ ํŒŒ์•…ํ•˜๊ธฐ

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋”ฉ ํ…Œ์ŠคํŠธ ์—ฐ์Šต, https://school.programmers.co.kr/learn/challenges ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. ์œ„ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต์— ๊ณต๊ฐœ๋œ ๋ฌธ์ œ๋Š” (์ฃผ)๊ทธ๋ ™์ด ์ €์ž‘๊ถŒ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://school.programmers.co.kr/learn/courses/30/lessons/59409 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”. programmers.co.kr โ–  ํ’€์ด SELECT ANIMAL_ID, NAME, CASE WHEN (SEX_UPON_INTAKE LIKE 'Neutered..

[Programmers] ๋ณดํ˜ธ์†Œ์—์„œ ์ค‘์„ฑํ™”ํ•œ ๋™๋ฌผ

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋”ฉ ํ…Œ์ŠคํŠธ ์—ฐ์Šต, https://school.programmers.co.kr/learn/challenges ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. ์œ„ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต์— ๊ณต๊ฐœ๋œ ๋ฌธ์ œ๋Š” (์ฃผ)๊ทธ๋ ™์ด ์ €์ž‘๊ถŒ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://school.programmers.co.kr/learn/courses/30/lessons/59045#fn1 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”. programmers.co.kr * ๋ณธ ๋ฌธ์ œ๋Š” Kaggle์˜ "Austin Animal Center Shelter Intakes and Outcomes..

[Programmers] ์žˆ์—ˆ๋Š”๋ฐ์š” ์—†์—ˆ์Šต๋‹ˆ๋‹ค

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋”ฉ ํ…Œ์ŠคํŠธ ์—ฐ์Šต, https://school.programmers.co.kr/learn/challenges ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. ์œ„ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต์— ๊ณต๊ฐœ๋œ ๋ฌธ์ œ๋Š” (์ฃผ)๊ทธ๋ ™์ด ์ €์ž‘๊ถŒ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://school.programmers.co.kr/learn/courses/30/lessons/59043 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”. programmers.co.kr * ๋ณธ ๋ฌธ์ œ๋Š” Kaggle์˜ "Austin Animal Center Shelter Intakes and Outcomes"์—์„œ ..

[Programmers] ์—†์–ด์ง„ ๊ธฐ๋ก ์ฐพ๊ธฐ

๐Ÿ“ข ๋ณธ ํฌ์ŠคํŒ…์— ํ™œ์šฉ๋˜๋Š” ๊ธฐ๋ณธ ๋ฌธ์ œ ๋ฐ ์ž๋ฃŒ ์ถœ์ฒ˜๋Š” ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋”ฉ ํ…Œ์ŠคํŠธ ์—ฐ์Šต, https://school.programmers.co.kr/learn/challenges ์ž„์„ ๋ฐํž™๋‹ˆ๋‹ค. ์œ„ ์ฝ”๋”ฉํ…Œ์ŠคํŠธ ์—ฐ์Šต์— ๊ณต๊ฐœ๋œ ๋ฌธ์ œ๋Š” (์ฃผ)๊ทธ๋ ™์ด ์ €์ž‘๊ถŒ์„ ๊ฐ€์ง€๊ณ  ์žˆ์Šต๋‹ˆ๋‹ค. โ–  ๋ฌธ์ œ https://school.programmers.co.kr/learn/courses/30/lessons/59042 ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค ์ฝ”๋“œ ์ค‘์‹ฌ์˜ ๊ฐœ๋ฐœ์ž ์ฑ„์šฉ. ์Šคํƒ ๊ธฐ๋ฐ˜์˜ ํฌ์ง€์…˜ ๋งค์นญ. ํ”„๋กœ๊ทธ๋ž˜๋จธ์Šค์˜ ๊ฐœ๋ฐœ์ž ๋งž์ถคํ˜• ํ”„๋กœํ•„์„ ๋“ฑ๋กํ•˜๊ณ , ๋‚˜์™€ ๊ธฐ์ˆ  ๊ถํ•ฉ์ด ์ž˜ ๋งž๋Š” ๊ธฐ์—…๋“ค์„ ๋งค์นญ ๋ฐ›์œผ์„ธ์š”. programmers.co.kr * ๋ณธ ๋ฌธ์ œ๋Š” Kaggle์˜ "Austin Animal Center Shelter Intakes and Outcomes"์—์„œ ..