# Concepts

- [Replications](https://docs.slingdata.io/concepts/replication.md): Multiple streams in a YAML or JSON file. Best way to scale Sling.
- [Structure](https://docs.slingdata.io/concepts/replication/structure.md)
- [Modes](https://docs.slingdata.io/concepts/replication/modes.md)
- [Source Options](https://docs.slingdata.io/concepts/replication/source-options.md)
- [Target Options](https://docs.slingdata.io/concepts/replication/target-options.md)
- [Columns](https://docs.slingdata.io/concepts/replication/columns.md)
- [Transforms](https://docs.slingdata.io/concepts/replication/transforms.md): Using Sling transforms
- [Runtime Variables](https://docs.slingdata.io/concepts/replication/runtime-variables.md): Learn how to use Runtime & Environment Variables with Sling
- [Tags & Wildcards](https://docs.slingdata.io/concepts/replication/tags-wildcards.md)
- [Merge Strategy](https://docs.slingdata.io/concepts/replication/merge-strategy.md)
- [Templates](https://docs.slingdata.io/concepts/replication/templates.md)
- [API Specs](https://docs.slingdata.io/concepts/api-specs.md)
- [Structure](https://docs.slingdata.io/concepts/api-specs/structure.md)
- [Authentication](https://docs.slingdata.io/concepts/api-specs/authentication.md)
- [Requests & Iteration](https://docs.slingdata.io/concepts/api-specs/request.md)
- [Response Processing](https://docs.slingdata.io/concepts/api-specs/response.md)
- [Advanced Features](https://docs.slingdata.io/concepts/api-specs/advanced.md)
- [Queues](https://docs.slingdata.io/concepts/api-specs/queues.md)
- [Dynamic Endpoints](https://docs.slingdata.io/concepts/api-specs/dynamic-endpoints.md)
- [Testing & Debugging](https://docs.slingdata.io/concepts/api-specs/testing-debug.md)
- [Troubleshooting](https://docs.slingdata.io/concepts/api-specs/troubleshooting.md): Common errors and debugging tips for Sling API specifications
- [Change Capture (CDC)](https://docs.slingdata.io/concepts/change-capture.md): Continuously replicate row-level changes using Change Data Capture (CDC)
- [MySQL / MariaDB](https://docs.slingdata.io/concepts/change-capture/mysql.md): CDC source setup for MySQL and MariaDB
- [PostgreSQL](https://docs.slingdata.io/concepts/change-capture/postgres.md): CDC source setup for PostgreSQL
- [SQL Server](https://docs.slingdata.io/concepts/change-capture/sql-server.md): CDC source setup for SQL Server
- [Oracle](https://docs.slingdata.io/concepts/change-capture/oracle.md): CDC source setup for Oracle
- [MongoDB](https://docs.slingdata.io/concepts/change-capture/mongodb.md): CDC source setup for MongoDB
- [Hooks / Steps](https://docs.slingdata.io/concepts/hooks.md): Execute custom actions throughout your replication or pipeline
- [Check](https://docs.slingdata.io/concepts/hooks/check.md)
- [Command](https://docs.slingdata.io/concepts/hooks/command.md)
- [Copy](https://docs.slingdata.io/concepts/hooks/copy.md)
- [Delete](https://docs.slingdata.io/concepts/hooks/delete.md)
- [Group](https://docs.slingdata.io/concepts/hooks/group.md)
- [Http](https://docs.slingdata.io/concepts/hooks/http.md)
- [Inspect](https://docs.slingdata.io/concepts/hooks/inspect.md)
- [List](https://docs.slingdata.io/concepts/hooks/list.md)
- [Log](https://docs.slingdata.io/concepts/hooks/log.md)
- [Query](https://docs.slingdata.io/concepts/hooks/query.md)
- [Replication](https://docs.slingdata.io/concepts/hooks/replication.md)
- [Routine](https://docs.slingdata.io/concepts/hooks/routine.md)
- [Store](https://docs.slingdata.io/concepts/hooks/store.md)
- [Read](https://docs.slingdata.io/concepts/hooks/read.md)
- [Write](https://docs.slingdata.io/concepts/hooks/write.md)
- [Pipelines](https://docs.slingdata.io/concepts/pipeline.md): Use Pipelines to orchestrate multiple steps in sequence
- [Examples](https://docs.slingdata.io/concepts/pipeline/examples.md)
- [Data Quality](https://docs.slingdata.io/concepts/data-quality.md): Learn how to use sling for data quality
- [Constraints](https://docs.slingdata.io/concepts/data-quality/constraints.md): Learn how to use constraints
- [Functions](https://docs.slingdata.io/concepts/functions.md)


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