이론 관련/컴퓨터 관련 sql join 집합별 쿼리(차집합, 교집합 등등) 구차니 2019. 10. 22. 14:41 [링크 : https://www.codeproject.com/Articles/33052/Visual-Representation-of-SQL-Joins] [링크 : https://stackoverflow.com/questions/4560471/how-to-exclude-rows-that-dont-join-with-another-table] 저작자표시