T.I.L_230208

What’s New for Today

1. Algorithm
   • 531
     • dfs, recursion
   • 803
     • implementation
   • 1244
     • implementation
2. JPA
   • recap
     • commmand and query seperation
       • ex:
         • OrderSerivce: 비즈니스 로직 처리
         • OrderQueryService: 화면 처리 서비스
     • osiv vs performance
   • spring data jpa
     • apply MemberRepository
   • queryDsl
     • apply OrderSearch filtering in OrderRepository