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- Topic_Graphic → Domain_Design
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- 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
2026-07-11 11:05:56 +09:00

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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
sql-not SQL Not Database draft conceptual
SQL NOT Operator
NOT operator
SQL 부정
B 0.9 2026-07-04 2026-07-04
sql
database
w3schools
not
operators
where
https://www.w3schools.com/sql/sql_not.asp

SQL Not

🎯 한 줄 통찰 (One-line insight)

The NOT operator reverses a WHERE condition's truth value, and combines with LIKE, BETWEEN, IN, IS NULL, and comparison operators to express exclusion. [S1]

🧠 핵심 개념 (Core concepts)

  • NOT operator — returns records that do NOT match the specified criteria, reversing a condition from true to false and vice versa. [S1]
  • SyntaxSELECT ... FROM table_name WHERE NOT condition;. [S1]
  • Common NOT combinationsNOT LIKE, NOT BETWEEN, NOT IN, IS NOT NULL, NOT EXISTS. [S1]
  • NOT with comparisons — "not greater than" and "not less than" are expressed as WHERE NOT column > value / WHERE NOT column < value, rather than dedicated operators. [S1]

🧩 추출된 패턴 (Extracted patterns)

  • Negate-by-wrapping — rather than a distinct exclusion operator per case, SQL wraps NOT around an existing predicate (=, LIKE, BETWEEN, IN, comparison), giving a single uniform negation mechanism. [S1]

📖 세부 내용 (Details)

  • Basic negated equality: SELECT * FROM Customers WHERE NOT Country = 'Spain';. [S1]
  • NOT LIKE: WHERE CustomerName NOT LIKE 'A%'; excludes names starting with "A". [S1]
  • NOT BETWEEN: WHERE CustomerID NOT BETWEEN 10 AND 60; selects rows outside the inclusive range. [S1]
  • NOT IN: WHERE City NOT IN ('Paris', 'London'); excludes rows matching any listed value. [S1]
  • NOT with comparison: WHERE NOT CustomerID > 50; (not greater than) and WHERE NOT CustomerId < 50; (not less than). [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — NOT은 LIKE/BETWEEN/IN 챕터 각각에서 반대 조건을 표현하는 공통 도구로 재사용된다. [S1]

💻 코드 패턴 (Code patterns)

Basic NOT (SQL):

SELECT * FROM Customers
WHERE NOT Country = 'Spain';

NOT combined with IN (SQL):

SELECT * FROM Customers
WHERE City NOT IN ('Paris', 'London');

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)

📚 출처 (Sources)

📝 변경 이력 (Change history)

  • 2026-07-04: Initial draft synthesized from the W3Schools "SQL NOT Operator" page (Astra wiki-curation, P-Reinforce v3.1 format).