refactor(topics): 멀티 에이전트용 지식 재편 — _Common(공통 기본기) + Domain_* 구조
에이전트 8종(대화형/프로그래머 C·S/디자이너/설계자/기획자/QA/PD/PM)에게 [공통 기본 능력 + 롤별 Specialty] 2층으로 지식을 주입하기 위한 재분류. 문서 내용·포맷은 무수정, 폴더 이동만 (6,372개 문서 수 보존 확인). - Topic_Programming → Domain_Programming (내부 구조 보존) - Topic_Graphic → Domain_Design - Topic_Business → Domain_Product - Topic_General → Domain_General - _Common 신설: Math(구 Topic_Math_Specialty), Reasoning(구 General/From_Thinking & Reasoning), Reasoning_Creativity(구 General/From_창의성), Communication(Poetic_Blog_Writing + From_writing) - 타 도메인의 From_* 폴더는 유지 (출처 표기일 뿐, 이미 도메인에 맞게 분류된 문서) - 빈 폴더 정리 (memory/procedures) - 에이전트→폴더 매핑은 workspace의 .astra/agent-knowledge-map.json (9개 에이전트) Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
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Antigravity Agent
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---
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id: sql-intro
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title: "SQL Intro"
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category: "Database"
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status: "draft"
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verification_status: "conceptual"
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canonical_id: ""
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aliases: ["SQL Introduction", "What is SQL", "SQL 소개", "Structured Query Language"]
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duplicate_of: ""
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source_trust_level: "B"
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confidence_score: 0.9
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created_at: 2026-07-04
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updated_at: 2026-07-04
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review_reason: ""
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merge_history: []
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tags: ["sql", "database", "w3schools", "rdbms", "basics"]
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raw_sources: ["https://www.w3schools.com/sql/sql_intro.asp"]
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applied_in: []
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github_commit: ""
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---
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# [[SQL Intro]]
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## 🎯 한 줄 통찰 (One-line insight)
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SQL is the ANSI/ISO-standard language for accessing and manipulating data in a Relational Database Management System (RDBMS), where data lives in tables made of rows and columns. [S1]
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## 🧠 핵심 개념 (Core concepts)
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- **SQL (Structured Query Language)** — a standard language for accessing and manipulating databases, standardized by ANSI (1986) and ISO (1987). [S1]
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- **What SQL can do** — execute queries, retrieve/insert/update/delete records, create databases/tables/stored procedures/views, and set permissions on tables, procedures, and views. [S1]
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- **Standard but fragmented** — although SQL is an ANSI/ISO standard, different database systems implement their own proprietary extensions on top of a common core (SELECT/UPDATE/DELETE/INSERT/WHERE). [S1]
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- **RDBMS (Relational Database Management System)** — the basis for SQL and all modern database systems (MS SQL Server, IBM DB2, Oracle, MySQL, MS Access); data is stored in tables, where a column is a vertical entity and a record (row) is a horizontal entity. [S1]
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- **Using SQL on a web site** — typically requires an RDBMS program (MS Access/SQL Server/MySQL), a server-side scripting language (PHP/ASP) to run SQL, and HTML/CSS to present the results. [S1]
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## 🧩 추출된 패턴 (Extracted patterns)
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- **Table = columns + rows** — every RDBMS models data as tables where columns define the schema and records (rows) hold the data. [S1]
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- **Standard-core + vendor-extension** — expect the major commands to work everywhere, but expect proprietary extensions to differ per vendor. [S1]
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- **Three-layer web stack** — RDBMS (data) + server-side language (logic) + HTML/CSS (presentation) is the classic pattern for a database-backed web site. [S1]
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## 📖 세부 내용 (Details)
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- SQL stands for **Structured Query Language** and lets you access and manipulate data stored in a database. [S1]
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- It became a standard of the American National Standards Institute (ANSI) in 1986 and of the International Organization for Standardization (ISO) in 1987. [S1]
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- Example table ("Customers") illustrates the RDBMS model:
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```sql
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SELECT * FROM Customers;
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```
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- The Customers example table has columns `CustomerID, CustomerName, ContactName, Address, City, PostalCode, Country`, and each row is one customer record. [S1]
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## ⚖️ 모순 및 업데이트 (Contradictions & updates)
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소스에서 모순되는 정보는 발견되지 않음.
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## 🛠️ 적용 사례 (Applied in summary)
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현재 발견된 실제 적용 사례가 없습니다 — 이 문서는 개론(Intro) 페이지로, 이후 SQL 튜토리얼 전체(SELECT/WHERE/JOIN 등)에서 여기서 정의한 RDBMS/테이블 모델이 반복 적용된다. [S1]
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## 💻 코드 패턴 (Code patterns)
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Select all records from a table (SQL):
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```sql
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SELECT * FROM Customers;
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```
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## ✅ 검증 상태 및 신뢰도
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- **상태:** draft
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- **검증 단계:** conceptual
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- **출처 신뢰도:** B (W3Schools — widely used educational reference, not a primary standards body)
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- **신뢰 점수:** 0.90
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- **중복 검사 결과:** 신규 생성 (New discovery)
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## 🔗 지식 그래프 (Knowledge Graph)
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- **상위/루트:** [[SQL Tutorial]]
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- **관련 개념:** [[SQL Syntax]], [[SQL Select]], [[SQL Create Table]]
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- **참조 맥락:** SQL 튜토리얼 전체의 진입점 — RDBMS/테이블 모델을 처음 정의하는 문서.
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## 📚 출처 (Sources)
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- [S1] W3Schools — SQL Intro — https://www.w3schools.com/sql/sql_intro.asp
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## 📝 변경 이력 (Change history)
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- 2026-07-04: Initial draft synthesized from the W3Schools "SQL Intro" page (Astra wiki-curation, P-Reinforce v3.1 format).
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