T-SQL in Fabric Warehouse – What’s Supported and What’s Not | Microsoft Fabric Tutorial

T-SQL in Fabric Warehouse – What’s Supported and What’s Not

Microsoft Fabric introduces powerful T-SQL support within the Fabric Warehouse. However, there are some important differences between what you can do in a Warehouse vs a SQL Analytics Endpoint.

✅ Supported T-SQL Features in Fabric Warehouse

CREATE, ALTER, DROP for tables, views, functions, and procedures
Full support for INSERT, UPDATE, DELETE, and TRUNCATE
sp_rename to rename columns
Common Table Expressions (CTEs), including nested CTEs (Preview)
Session-scoped #temp tables
ADD/DROP COLUMN (nullable only)
ADD/DROP CONSTRAINT (only with NOT ENFORCED)

❌ Not Supported T-SQL Features

MERGE, PREDICT, TRIGGERS
SET ROWCOUNT, SET TRANSACTION ISOLATION LEVEL
IDENTITY columns
FOR JSON and FOR XML in subqueries
ALTER TABLE (only limited cases supported)
sp_showspaceused, CREATE USER
Recursive queries
Materialized views
Manual statistics (auto only)

⚠️ SQL Analytics Endpoint – Key Limitations

Read-only access to Delta tables
Can create views and functions referencing Delta Lake
No INSERT, UPDATE, DELETE, or CREATE TABLE support
Designed for analytical querying, not DML operations

✅ Use Fabric Warehouse for complete DML + DDL capabilities.
🔍 Use SQL Analytics Endpoint for querying Lakehouse Delta tables only.

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