# SQL Reference

The FDB relational subproject provides a SQL API for interacting with Record Layer databases. This SQL API is currently under active development and is expected
to change frequently. This reference is currently also a work in progress to be updated as the SQL engine develops.


```{toctree}
:caption: SQL
:maxdepth: 2

reference/sql_types
reference/sql_commands
reference/Functions
```

```{toctree}
:caption: Data Model
:maxdepth: 2

reference/Databases_Schemas_SchemaTemplates
reference/Tables
reference/Indexes
```

```{toctree}
:caption: Miscellaneous
:maxdepth: 2

reference/Direct_Access_Api
reference/understanding_bitmap
```