1.4 Standards Support Requirements

An SQL implementation that is fully compliant with the SQL standards implements all mandatory features and optionally implements any optional features. For Part 3 of the standards (International Standard ISO/IEC 9075), the normative variations from mandatory features are listed in Mandatory Features (section 2.1.1) and the normative variations from optional features are listed in Optional Features (section 2.1.2).

This document covers Transact-SQL alignment with normative statements in the ISO/IEC standard. This document does not include:

• Clarifications of ambiguity in the target specification.

• Intended points of variability in the target specification, such as the use of MAY, SHOULD, or RECOMMENDED.

• The use of extensibility points, such as optional implementation-specific data.

The following table lists the sections of [ISO/IEC9075-3:2008] that are considered normative and that are considered informative.