T.I.L_220805

What’s New for Today

1. Algorithm
   • q9252
2. JPA Recap
   • Embedded Type
     • Sharing + Immutable Instance
   • Column Collections
     • update limitations
     • using entity as column collections
3. Spring Boot + AWS Webservice
   • Oauth2
   • Spring Security
   • Google Oauth2
   • Naver Oauth2