# buildings-lei/mysql_note architecture

> Architecture diagram of the GitHub repository buildings-lei/mysql_note, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-09-29). It is an AI-made overview: check details against the source.

- Interactive diagram: https://gitdiagram.com/buildings-lei/mysql_note
- Repository: https://github.com/buildings-lei/mysql_note

## Overview

This repository is a Chinese-language MySQL learning reference, not an application or runtime library. Its principal workflow is for a learner to consult SQL guidance, submit statements to a MySQL server, and receive query results. The README documents schema operations (DDL), data changes (DML), queries (DQL), user and permission management (DCL), and SQL function families. The tree contains no implementation source, so the diagram represents documented concepts and the learner–database interaction rather than internal code wiring.

Main entry points: [`README.md`](https://github.com/buildings-lei/mysql_note/blob/main/README.md) (DDL Guide)

## Diagram (Mermaid)

```mermaid
flowchart TD

subgraph group_schema["Schema Management"]
  node_ddl["DDL Guide<br/>[README.md]"]
end

subgraph group_changes["Data Changes"]
  node_dml["DML Guide<br/>[README.md]"]
end

subgraph group_queries["Data Queries"]
  node_dql["DQL Guide<br/>[README.md]"]
end

subgraph group_access["Access Control"]
  node_dcl["DCL Guide<br/>[README.md]"]
end

subgraph group_functions["SQL Functions"]
  node_string_functions["String Functions<br/>[README.md]"]
  node_numeric_functions["Numeric Functions<br/>[README.md]"]
  node_date_functions["Date Functions<br/>[README.md]"]
  node_flow_functions["Flow Functions<br/>[README.md]"]
end

node_learner(("Learner"))
node_mysql["MySQL Server"]
node_database[("Database")]
node_results["Query Results"]

node_learner -->|"reads"| node_ddl
node_learner -->|"reads"| node_dml
node_learner -->|"reads"| node_dql
node_learner -->|"reads"| node_dcl
node_learner -->|"reads"| node_string_functions
node_learner -->|"reads"| node_numeric_functions
node_learner -->|"reads"| node_date_functions
node_learner -->|"reads"| node_flow_functions
node_learner -->|"submits SQL"| node_mysql
node_mysql -->|"manages objects"| node_database
node_mysql -->|"changes records"| node_database
node_mysql -->|"queries records"| node_database
node_mysql -->|"controls access"| node_database
node_mysql -->|"returns rows"| node_results
node_results -->|"displays"| node_learner

click node_ddl "https://github.com/buildings-lei/mysql_note/blob/main/README.md"
click node_dml "https://github.com/buildings-lei/mysql_note/blob/main/README.md"
click node_dql "https://github.com/buildings-lei/mysql_note/blob/main/README.md"
click node_dcl "https://github.com/buildings-lei/mysql_note/blob/main/README.md"
click node_string_functions "https://github.com/buildings-lei/mysql_note/blob/main/README.md"
click node_numeric_functions "https://github.com/buildings-lei/mysql_note/blob/main/README.md"
click node_date_functions "https://github.com/buildings-lei/mysql_note/blob/main/README.md"
click node_flow_functions "https://github.com/buildings-lei/mysql_note/blob/main/README.md"

classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a
classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554
classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f
classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d
classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337
classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81
classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a
class node_ddl toneBlue
class node_dml,node_database toneAmber
class node_dql,node_mysql toneMint
class node_dcl toneRose
class node_string_functions,node_numeric_functions,node_date_functions,node_flow_functions,node_learner,node_results toneIndigo
```

## Components

### Schema Management

- [DDL Guide](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`

### Data Changes

- [DML Guide](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`

### Data Queries

- [DQL Guide](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`

### Access Control

- [DCL Guide](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`

### SQL Functions

- [String Functions](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`
- [Numeric Functions](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`
- [Date Functions](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`
- [Flow Functions](https://github.com/buildings-lei/mysql_note/blob/main/README.md): `README.md`

### Other components

- **Learner**
- **MySQL Server**
- **Database**
- **Query Results**

## Connections

- Learner → DDL Guide: reads
- Learner → DML Guide: reads
- Learner → DQL Guide: reads
- Learner → DCL Guide: reads
- Learner → String Functions: reads
- Learner → Numeric Functions: reads
- Learner → Date Functions: reads
- Learner → Flow Functions: reads
- Learner → MySQL Server: submits SQL
- MySQL Server → Database: manages objects
- MySQL Server → Database: changes records
- MySQL Server → Database: queries records
- MySQL Server → Database: controls access
- MySQL Server → Query Results: returns rows
- Query Results → Learner: displays