sqlite-opslisted
Install: claude install-skill aiskillstore/marketplace
# SQLite Operations
Patterns for SQLite databases in Python projects.
## Quick Connection
```python
import sqlite3
def get_connection(db_path: str) -> sqlite3.Connection:
conn = sqlite3.connect(db_path, check_same_thread=False)
conn.row_factory = sqlite3.Row # Dict-like access
conn.execute("PRAGMA journal_mode=WAL") # Better concurrency
conn.execute("PRAGMA foreign_keys=ON")
return conn
```
## Context Manager Pattern
```python
from contextlib import contextmanager
@contextmanager
def db_transaction(conn: sqlite3.Connection):
try:
yield conn
conn.commit()
except Exception:
conn.rollback()
raise
```
## WAL Mode
Enable for concurrent read/write:
```python
conn.execute("PRAGMA journal_mode=WAL")
```
| Mode | Reads | Writes | Best For |
|------|-------|--------|----------|
| DELETE (default) | Blocked during write | Single | Simple scripts |
| WAL | Concurrent | Single | Web apps, MCP servers |
## Common Gotchas
| Issue | Solution |
|-------|----------|
| "database is locked" | Use WAL mode |
| Slow queries | Add indexes, check EXPLAIN QUERY PLAN |
| Thread safety | Use `check_same_thread=False` |
| FK not enforced | Run `PRAGMA foreign_keys=ON` |
## CLI Quick Reference
```bash
sqlite3 mydb.sqlite # Open database
.tables # Show tables
.schema items # Show schema
.headers on && .mode csv && .output data.csv # Export CSV
VACUUM; # Reclaim space
```
## When to Use