mongodb
MongoDB schema design, aggregation pipelines, indexing strategies, and performance.
What this skill does
# MongoDB Skill
Expert assistance for MongoDB database design and operations.
## Capabilities
- Design document schemas
- Build aggregation pipelines
- Create optimal indexes
- Implement data modeling patterns
- Configure replication and sharding
## Aggregation Pipeline
```typescript
const results = await collection.aggregate([
{ $match: { status: 'active' } },
{ $group: { _id: '$category', total: { $sum: '$amount' } } },
{ $sort: { total: -1 } },
{ $limit: 10 },
]).toArray();
```
## Indexing
```typescript
// Compound index
await collection.createIndex({ userId: 1, createdAt: -1 });
// Text index
await collection.createIndex({ title: 'text', content: 'text' });
```
## Target Processes
- mern-stack-development
- database-design
- backend-development
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