sql

name	sql
description	Help write, debug, and explore SQLite database queries using Kysely. Use when writing repository code, exploring data, debugging query issues, or understanding the database schema.

SQL Database Helper

Databases

File	Purpose	When to use
db.sqlite3	Development database	Writing/testing new features, running the dev server
db-prod.sqlite3	Copy of production database	Exploring real data, investigating bugs, verifying assumptions about data shape
db-test.sqlite3	Unit test database (blank + migrations)	Unit tests only

db-prod.sqlite3 can be modified if the task requires it. Never modify db-copy.sqlite3 — it is the untouched backup.

Schema

All table definitions live in app/db/tables.ts. Read this file first to understand available tables, columns, and their types. Key conventions:

• Every table has a numeric id primary key (type number)
• Booleans are stored as 0/1 (type DBBoolean)

Exploring data

When the user needs to explore or query existing data, use sqlite3 CLI commands against the appropriate database.

Important: Always quote table and column names with double quotes ("TableName", "columnName") because the schema uses camelCase naming and some names are reserved SQL keywords.

# Explore production data
sqlite3 db-prod.sqlite3 'SELECT * FROM "User" LIMIT 5;'

# Check schema of a table
sqlite3 db-prod.sqlite3 '.schema "User"'

# Count rows
sqlite3 db-prod.sqlite3 'SELECT COUNT(*) FROM "User";'

# Development database
sqlite3 db.sqlite3 'SELECT * FROM "User" LIMIT 5;'