전체 글426 [Daily] 0829(일) 📌 오늘의 회화 주간 복습 📌 오늘의 단어 grimace : 얼굴을 찡그리다 peak : 절정, 정점, 최고조 graze : (소, 양 등을) 방목하다 vessel : 선박 2021. 8. 30. [Daily] 0828(토) 📌 오늘의 회화 W : I can't figure out how to use the washing machine. M : It's not rocket science. W : Can you show me how? M : Have you already put the laundry inside? W : Yes, and I added the laundry detergent, too. M : Then you just turn this dial and hit start. W : That's all there is to it? M : See, I told you it was easy! 📌 오늘의 단어 It's not rocket science. : 그렇게 복잡하지 않아, 그거 간단해. That's all there .. 2021. 8. 28. [Daily] 0827(금) 📌 오늘의 회화 M : I've had it up to here with Tom's complaining. W : What's his problem now? M : He's annoyed about the lack of parking on Main Street. W : There's always something ticking him off. M : Yeah, I wish he'd just contact the city council directly. W : Exactly, I'm tired of hearing him moan about stuff. M : Maybe we should have a talk with him. W : Yeah, let's encourage him to be more posi.. 2021. 8. 28. [Daily] 0826(목) 📌 오늘의 회화 W : The break room is such a mess these days. M : Yeah, things have gotten ouf of hand. W : What are we going to do about it? M : I'll make a cleaning schedule for our staff. W : That's a great idea. M : But do you think our workers will stick to it? W : I'm sure they will. M : Okay, I'll post the schedule later today then. 📌 오늘의 단어 out of hand : 감당할 수 없는, 손쓸 수 없는 mess : 엉망(인 것) hauntin.. 2021. 8. 27. [Daily] 0825(수) 📌 오늘의 회화 M : I can't believe the store was sold out of the new cell phone. W : Well, you snooze, you lose. M : What do you mean by that? W : You should've been lining up at 6 a.m. this morning. M : I suppose so, but I thought 9 would be ealry enough. W : No way! There's so much hype about that model. M : Yeah, I guess a lot of people couldn't wait to get their hands on it. Don't worry. You'll fi.. 2021. 8. 25. [Daily] 0824(화) 📌 오늘의 회화 W : When are you going to forgive Frank? M : When hell freezes over! W : But he already apologized for breaking your watch. M : That's true but he didn't offer to pay for it. W : Oh, he didn't tell me that. M : Yeah, the repairs cost me almost $200! W : I guess I can see it from your side then. M : Thanks. It's just a shame that it happened this way. 📌 오늘의 단어 When hell freezes over! : 절.. 2021. 8. 24. [Daily] 0823(월) 📌 오늘의 회화 M : What do you make of the new store manager? W : He seems pretty friendly to me. M : Yeah, most of the staff seem to like him. W : I heard he's had over 20 years of management experience. M : Oh, I wasn't aware of that. W : That's why he gets along with our employees so well. M : Well, it really shows. W : Yeah he's settled in very quickly. 📌 오늘의 단어 What do you make of ~ ? : ~는 어떤 것 같.. 2021. 8. 23. [2과목] - SQL 최적화 기본 원리 CBO(Cost Based Optimizer) - 비용기반 옵티마이저 테이블 및 인덱스 등의 통계 정보를 활용하여 SQL문을 실행하는데 소요될 처리시간 및 CPU, I/O 자원량 등을 계산하여 가장 효율적일 것으로 예상되는 실행계획을 선택하는 옵티마이저 실행계획을 통해서 알 수 있는 정보 액세스 기법 질의 처리 예상 비용(Cost) 조인 방법 조인 순서 +) 실행계획을 읽는 순서는 위에서 아래로, 안에서 밖으로 읽는다. +) 실행계획은 SQL 처리를 위한 실행 절차와 방법을 표현한 것이다. +) CBO의 실행계획에는 단계별 예상 비용 및 건수 등이 표시된다.. cf) 실행계획은 예상 정보이다. 실제 처리 건수는 트레이스 정보를 통해서 알 수 있다. cf) 실행계획 즉, 실행방법이 달라진다고 해서 동일 S.. 2021. 8. 23. [Daily] 0822(일) 📌 오늘의 회화 주간 복습 📌 오늘의 단어 amuse : (사람을) 즐겁게[미소 짓게/재미있게] 하다 goodless : 신[하느님]을 믿지 않는 push back : 미루다, 연기하다 2021. 8. 22. 이전 1 ··· 23 24 25 26 27 28 29 ··· 48 다음