Files

T

Antigravity Agent e9cbf23ab5 docs(10_Wiki): Dev 폴더 누락분 반영 — Topic_Programming으로 통합

이전 재구성 작업에서 Dev/ 폴더가 누락되었던 것을 반영.

- Dev/Topic_Programming(중첩 폴더, 78개)은 Dev 자체 최상위 폴더들
  (Architecture/Conventions/Engineering_Intelligence 등)과 완전 중복이라 제거.
- Dev 최상위 엔지니어링 지식 폴더(Architecture/Conventions/Engineering_Intelligence/
  Failure_Library/Generalized_Principles/Language/Pattern_Catalog/Platform_Guides/
  Subsystems, 77개)는 이미 Topic_Programming/Topic_Programming에 더 최신 버전이
  존재해 중복 제거(고유 콘텐츠 1개는 예외 처리하여 이동 보존).
- Dev의 W3Schools 언어 튜토리얼 폴더(Topic_C/CPP/CSS/CSharp/HOWTO/HTML/Java/
  JavaScript/PHP/Python/SQL/W3CSS, 1201개)는 전부 Topic_Programming 하위로 이동.
- 에이전트 운영 상태(.astra/docs)는 그대로 유지, 콘텐츠 폴더만 정리.
- Topic_Programming 최종 문서 수: 2784 → 3985.

2026-07-05 00:39:13 +09:00

3.3 KiB

Raw Blame History

id, title, category, status, verification_status, canonical_id, aliases, duplicate_of, source_trust_level, confidence_score, created_at, updated_at, review_reason, merge_history, tags, raw_sources, applied_in, github_commit

title

SQL Order By

🎯 한 줄 통찰 (One-line insight)

ORDER BY sorts a result-set by one or more columns, ascending by default, and can mix ascending/descending direction per column. [S1]

🧠 핵심 개념 (Core concepts)

ORDER BY keyword — sorts the result-set in ascending (ASC, default) or descending (DESC) order. [S1]
Syntax — SELECT column1, column2, ... FROM table_name ORDER BY column1, column2, ... ASC|DESC;. [S1]
Alphabetical sorting — for text columns, ORDER BY sorts alphabetically (and reverse-alphabetically with DESC). [S1]
Multi-column sort — sorting by several columns applies the first column as primary sort key and subsequent columns as tie-breakers. [S1]

🧩 추출된 패턴 (Extracted patterns)

Per-column direction — each column in a multi-column ORDER BY can independently specify ASC or DESC, e.g. ORDER BY Country ASC, CustomerName DESC. [S1]

📖 세부 내용 (Details)

Sort ascending by default: SELECT * FROM Products ORDER BY Price;. [S1]
Sort descending: SELECT * FROM Products ORDER BY Price DESC;. [S1]
Sort multiple columns, Country first then CustomerName as tie-break: SELECT * FROM Customers ORDER BY Country, CustomerName;. [S1]
Combine directions per column: SELECT * FROM Customers ORDER BY Country ASC, CustomerName DESC;. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — 정렬은 이후 JOIN/GROUP BY 결과를 사람이 읽기 좋게 만드는 데 반복적으로 함께 쓰인다. [S1]

💻 코드 패턴 (Code patterns)

Sort ascending (default) then descending (SQL):

SELECT * FROM Products ORDER BY Price;
SELECT * FROM Products ORDER BY Price DESC;

Multi-column sort with mixed direction (SQL):

SELECT * FROM Customers
ORDER BY Country ASC, CustomerName DESC;

✅ 검증 상태 및 신뢰도

상태: draft
검증 단계: conceptual
출처 신뢰도: B (W3Schools — widely used educational reference, not a primary standards body)
신뢰 점수: 0.90
중복 검사 결과: 신규 생성 (New discovery)

🔗 지식 그래프 (Knowledge Graph)

상위/루트: SQL Tutorial
관련 개념: SQL Select, SQL Where, SQL Group By
참조 맥락: 조회 결과를 정렬해서 보여줘야 하는 모든 쿼리에서 재사용되는 기본 문법.

📚 출처 (Sources)

[S1] W3Schools — SQL ORDER BY Keyword — https://www.w3schools.com/sql/sql_orderby.asp

📝 변경 이력 (Change history)

2026-07-04: Initial draft synthesized from the W3Schools "SQL ORDER BY Keyword" page (Astra wiki-curation, P-Reinforce v3.1 format).

3.3 KiB Raw Blame History