[프로그래머스/SQL 고득점 Kit] SELECT - 흉부외과 또는 일반외과 의사 목록 출력하기

https://school.programmers.co.kr/learn/courses/30/lessons/132203?language=mysql 

프로그래머스

 

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# ORACLE - sol.1

SELECT DR_NAME, DR_ID, MCDP_CD, TO_CHAR(HIRE_YMD, 'YYYY-MM-DD') AS HIRE_YMD
FROM DOCTOR
WHERE MCDP_CD = 'CS' OR MCDP_CD = 'GS'
ORDER BY HIRE_YMD DESC, DR_NAME ASC

# ORACLE - sol.2

SELECT DR_NAME, DR_ID, MCDP_CD, TO_CHAR(HIRE_YMD, 'YYYY-MM-DD') AS HIRE_YMD
FROM DOCTOR
WHERE MCDP_CD IN ('CS','GS')
ORDER BY HIRE_YMD DESC, DR_NAME ASC

 

 

# MYSQL - sol.1

SELECT DR_NAME, DR_ID, MCDP_CD, DATE_FORMAT(HIRE_YMD,'%Y-%m-%d') AS HIRE_YMD 
FROM DOCTOR
WHERE MCDP_CD='CS' OR MCDP_CD='GS'
ORDER BY HIRE_YMD DESC, DR_NAME ASC

# MYSQL - sol.2

SELECT DR_NAME, DR_ID, MCDP_CD, DATE_FORMAT(HIRE_YMD,'%Y-%m-%d') AS HIRE_YMD 
FROM DOCTOR
WHERE MCDP_CD IN ('CS','GS')
ORDER BY HIRE_YMD DESC, DR_NAME ASC

MYSQL

 

DATE_FORMAT(날짜 열,'%Y-%m-%d')

 

(ex) 2020년 3월 1일

Y = 2020

y = 20

M = March

m = 03

D = 1st

d = 01