The document discusses using the Exposed SQL framework to manage databases in Kotlin. It introduces Exposed as an open source SQL framework made by JetBrains that supports PostgreSQL, SQLite, Oracle, SQL Server and H2. Exposed provides two levels of database access - a DSL for type-safe SQL and DAOs for lightweight data objects. It demonstrates defining database schemas, connecting to databases, interacting with tables using the DSL and DAO, and building relationships between tables.

1. to ManageYour Database
Using the Exposed SQL Framework
Shengyou Fan
JetBrains Developer Advocate
Server-Side Kotlin Meetup vol.5
2022/09/02
Photo by Tobias Fischer on Unsplash

2. Sample Code
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Exposed: https://github.com/shengyou/exposed-demo
Ktor with Exposed: https://github.com/shengyou/ktor-with-exposed-demo

3. Plenty of choices
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4. Kotlin solutions
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5. Exposed SQL Framework
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https://github.com/JetBrains/Exposed
• SQL framework
• Lightweight
• 100% Kotlin
• Open Source
• Made by JetBrains

6. Supported databases
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PostgreSQL SQLite Oracle
SQL Server
H2 database

7. Two levels of database access
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DSL DAO
typesafe SQL wrapping DSL lightweight data access objects

8. Exposed DSL API
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DSL
typesafe SQL wrapping DSL

9. Exposed DAO API
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DAO
lightweight data access objects

10. Building relationships
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11. Retrospective
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• Introduction to Exposed
• Add dependencies and start a MySQL instance
• Design a database schema
• Connect to a database and create tables
• Interact with the database using the DSL and DAO
• Define the relationship between the tables
• Integrate with the Ktor framework

12. Shengyou Fan
shengyou.fan@jetbrains.com
Thanks for listening
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Using Exposed SQL Framework
to Manage Your Database