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[G1-Sync] Manual knowledge update

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Antigravity Agent
2026-04-30 22:42:02 +09:00
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10_Wiki/Topics/Relational Algebra in Databases.md
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---
id: P-REINFORCE-AUTO-DBRA-001
id: [[P-Reinforce]]-AUTO-DBRA-001
category: "10_Wiki/💡 Topics/AI"
confidence_score: 0.96
tags: [auto-reinforced, database, relational-algebra, mathematics, logic]
tags: [auto-reinforced, database, relational-algebra, mathematics, [[Logic]]]
last_reinforced: 2026-04-20
---
@@ -14,7 +14,7 @@ last_reinforced: 2026-04-20
## 📖 구조화된 지식 (Synthesized Content)
관계 대수(Relational Algebra)는 관계형 데이터베이스에서 데이터를 검색하고 조작하는 일련의 연산자들을 정의한 절차적 쿼리 언어의 기초입니다.
1. **기본 연산자 (Fundamental Operations)**:
1. **기본 연산자 (Fundamental [[Opera]]tions)**:
* **Select ($\sigma$)**: 조건에 맞는 행(Tuple) 추출. (SQL의 `WHERE`)
* **Project ($\pi$)**: 특정 열(Attribute)만 추출. (SQL의 `SELECT columns`)
* **Union ($\cup$)**: 두 테이블의 합집합.