# Documentation

## Basics

[Defining tables](defining_tables.md) - How to define tables using C++ structs.

[sqlgen::read](reading.md) - How to read data from a database.

[sqlgen::write](writing.md) - How to write data to a database.

[sqlgen::Result](result.md) - How sqlgen handles errors.

[sqlgen::PrimaryKey](primary_key.md) - How to define primary keys in sqlgen.

[sqlgen::Timestamp](timestamp.md) - How timestamps work in sqlgen.

[sqlgen::Varchar](varchar.md) - How varchars work in sqlgen.

[sqlgen::Flatten](flatten.md) - How to "inherit" fields from other structs.

[sqlgen::delete_from](delete_from.md) - How to delete data from a table.

[sqlgen::Pattern](pattern.md) - How to add regex pattern validation to avoid SQL injection.

## Supported databases

[postgres](postgres.md) - How to interact with PostgreSQL or a related database (Redshift, Aurora, Greenplum...).

[sqlite](sqlite.md) - How to interact with SQLite3.