SQL Practice 1

2023년 7월 27일

1. 문제 [[object Object]]

다음 환자 테이블에서 알레르기가 없는 환자의 이름과 성을 표시하는 SQL 구문을 작성하시오.

patient_id	first_name	last_name	gender	birth_date	city	province_id	allergies	height	weight
1	Donald	Waterfield	M	1963-02-12	Barrie	ON	NULL	156	65
2	Mickey	Baasha	M	1981-05-28	Dundas	ON	Sulfa	185	76
3	Jiji	Sharma	M	1957-09-05	Hamilton	ON	Penicillin	194	106
4	Blair	Diaz	M	1967-01-07	Hamilton	ON	NULL	191	104
5	Charles	Wolfe	M	2017-11-19	Orillia	ON	Penicillin	47	10
6	Sue	Falcon	F	2017-09-30	Ajax	ON	Penicillin	43	5

SELECT
  first_name,
  last_name
FROM patients
WHERE allergies IS NULL;

first_name	last_name
Donald	Waterfield
Blair	Diaz