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10_Wiki/Dev/Topic_SQL/SQL_Create_Table.md

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+---
+id: sql-create-table
+title: "SQL Create Table"
+category: "Database"
+status: "draft"
+verification_status: "conceptual"
+canonical_id: ""
+aliases: ["SQL CREATE TABLE Statement", "CREATE TABLE", "SQL 테이블 생성"]
+duplicate_of: ""
+source_trust_level: "B"
+confidence_score: 0.9
+created_at: 2026-07-04
+updated_at: 2026-07-04
+review_reason: ""
+merge_history: []
+tags: ["sql", "database", "w3schools", "createtable"]
+raw_sources: ["https://www.w3schools.com/sql/sql_create_table.asp"]
+applied_in: []
+github_commit: ""
+---
+
+# [[SQL Create Table]]
+
+## 🎯 한 줄 통찰 (One-line insight)
+CREATE TABLE defines a new table's columns, data types, and constraints, and a variant lets a new table be created directly from another table's SELECT result. [S1]
+
+## 🧠 핵심 개념 (Core concepts)
+- **CREATE TABLE statement** — creates a new table in a database. [S1]
+- **Syntax** — `CREATE TABLE table_name (column1 datatype constraint, column2 datatype constraint, ...);`. [S1]
+- **Constraint parameter** — optional; specifies data-integrity rules like PRIMARY KEY or NOT NULL. [S1]
+- **CREATE TABLE ... AS SELECT** — creates a new table populated from an existing table's query result. [S1]
+
+## 🧩 추출된 패턴 (Extracted patterns)
+- **Column defaults to nullable** — columns without an explicit `NOT NULL` allow NULL values by default. [S1]
+- **Filtered table clone** — `CREATE TABLE new_table AS SELECT ... FROM existing_table WHERE ...;` both creates the schema and populates it from a filtered subset in one step. [S1]
+
+## 📖 세부 내용 (Details)
+- Basic table with a primary key and a required column: [S1]
+```sql
+CREATE TABLE Persons (
+    PersonID int PRIMARY KEY,
+    LastName varchar(255) NOT NULL,
+    FirstName varchar(255),
+    Address varchar(255),
+    City varchar(255)
+);
+```
+- Create-and-populate from an existing table: `CREATE TABLE GermanCustomers AS SELECT * FROM Customers WHERE Country = 'Germany';`. [S1]
+
+## ⚖️ 모순 및 업데이트 (Contradictions & updates)
+소스에서 모순되는 정보는 발견되지 않음.
+
+## 🛠️ 적용 사례 (Applied in summary)
+현재 발견된 실제 적용 사례가 없습니다 — 생성 직후 INSERT INTO로 데이터를 채우는 것이 자연스러운 다음 단계로 안내된다. [S1]
+
+## 💻 코드 패턴 (Code patterns)
+Basic table definition (SQL):
+```sql
+CREATE TABLE Persons (
+    PersonID int PRIMARY KEY,
+    LastName varchar(255) NOT NULL,
+    FirstName varchar(255),
+    Address varchar(255),
+    City varchar(255)
+);
+```
+
+## ✅ 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 Constraints]], [[SQL Insert Into]], [[SQL Data Types]], [[SQL Drop Table]]
+- **참조 맥락:** 테이블 생성의 기본 문법 — Constraints/Data Types 챕터와 함께 이해해야 완전해진다.
+
+## 📚 출처 (Sources)
+- [S1] W3Schools — SQL CREATE TABLE Statement — https://www.w3schools.com/sql/sql_create_table.asp
+
+## 📝 변경 이력 (Change history)
+- 2026-07-04: Initial draft synthesized from the W3Schools "SQL CREATE TABLE Statement" page (Astra wiki-curation, P-Reinforce v3.1 format).