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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-max SQL Max Database draft conceptual
SQL MAX() Function
MAX function
SQL 최댓값
B 0.9 2026-07-04 2026-07-04
sql
database
w3schools
max
aggregate
https://www.w3schools.com/sql/sql_max.asp

SQL Max

🎯 한 줄 통찰 (One-line insight)

MAX() returns the largest value in a column across numeric, string, or date types, mirroring MIN() in syntax and usage. [S1]

🧠 핵심 개념 (Core concepts)

  • MAX() function — returns the largest value of the selected column; works with numeric, string, and date data types. [S1]
  • SyntaxSELECT MAX(column_name) FROM table_name WHERE condition;. [S1]
  • Unnamed result — needs an AS alias to name the returned column. [S1]
  • MAX() with GROUP BY — returns the largest value per group. [S1]

📖 세부 내용 (Details)

  • Highest price: SELECT MAX(Price) FROM Products;. [S1]
  • With alias: SELECT MAX(Price) AS HighestPrice FROM Products;. [S1]
  • On a date column: SELECT MAX(BirthDate) AS LatestBirthdate FROM Employees;. [S1]
  • With GROUP BY: SELECT MAX(Price) AS HighestPrice, CategoryID FROM Products GROUP BY CategoryID;. [S1]

⚖️ 모순 및 업데이트 (Contradictions & updates)

소스에서 모순되는 정보는 발견되지 않음.

🛠️ 적용 사례 (Applied in summary)

현재 발견된 실제 적용 사례가 없습니다 — MIN()과 짝을 이뤄 범위(최소~최대) 리포트에 자주 함께 쓰인다. [S1]

💻 코드 패턴 (Code patterns)

MAX with alias and GROUP BY (SQL):

SELECT MAX(Price) AS HighestPrice, CategoryID
FROM Products
GROUP BY CategoryID;

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 MAX() Function" page (Astra wiki-curation, P-Reinforce v3.1 format).