The featues available in the Azure SQL Database API are:

• Control of flow language keywords, Cursors, Data types, DML statements, Predicates, Sequence numbers, Stored procedures, and Variables.
• Automatic tuning (plan forcing), Change tracking, Database collation, Contained databases, Contained users, Data compression, Database configuration settings, Online index operations, Partitioning, and Temporal tables (see getting started guide).
• Application roles, Dynamic data masking (see getting started guide), Row Level Security, and Threat detection - see getting started guides for single database and elastic pools and managed instance.
• Graph processing, JSON data (see getting started guide), OPENXML, Spatial, OPENJSON, and XML indexes.