What database (system) have you worked with?

 I’m familiar with a wide range of databases and database management systems (DBMS). Here’s a categorized list of those I can help you with:

Relational Databases (SQL)

• MySQL
• PostgreSQL
• SQLite
• Microsoft SQL Server
• Oracle Database
• MariaDB

NoSQL Databases

• MongoDB (document-oriented)
• Cassandra (column-family)
• Redis (key-value store)
• DynamoDB
• CouchDB
• Firebase Realtime Database / Firestore

Graph Databases

• Neo4j
• Amazon Neptune
• ArangoDB

Time-Series Databases

• InfluxDB
• TimescaleDB

Search Databases

• Elasticsearch
• Amazon OpenSearch Service (formerly Elasticsearch Service)
• Solr

Embedded / Lightweight Databases

• LevelDB
• RocksDB
• Berkeley DB

I can help with tasks like querying, schema design, indexing, optimization, and more. Which one are you working with?