EF Core 7.0 (EF7) preview 3 is available from NuGet

Previews 1, 2, and 3 do not contain any big new features. However, these previews do contain 38 bug fixes and 46 smaller enhancements, including:

• Attribute (Data Annotations) mapping for composite primary keys
• SQL Server UTF8 collations
• Stop wrapping single changes in transactions where possible
• Use RETURNING/OUTPUT clause for UPDATE/DELETE
• SQLite SaveChanges: Use RETURNING clause
• SQL Server: Optimize SQL Server OUTPUT clause usage when retrieving database-generated values
• Stop automatically deleting orphans for optional relationships with cascade delete configured
• Empty default interface implementations for all interceptor interface methods
• Temporal tables support for owned entities and other table splitting scenarios
• Support for index ordering (ASC/DESC)
• Support "non-rooted" query expressions in compiled queries
• Property/Reference/etc overloads that take IProperty/INavigation
• Distinguish cancellation from failure to allow different logging strategies
• Lift table from subquery when joining if no additional operations
• DiagnosticSuppressor for CS8618 for DbSet properties
• Stop generating a default DbContext constructor when using dotnet ef dbcontext scaffold --no-onconfiguring
• Robust and extensible SQL precedence/parentheses mechanism
• Translation for string.IndexOf(string, int)
• Support SqlNullabilityProcessor and COALESCE with more than two arguments
• Support Contains when using a IReadOnlySet
• Overload of EnableRetryOnFailure that allows specifying errorCodesToAdd without count / delay

See GitHub for all issues resolved in preview 1, preview 2, and preview 3.