Discussion of open issues, suggestions and bugs regarding SDAC (SQL Server Data Access Components) for Delphi, C++Builder, Lazarus (and FPC)
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TMSQuery does not need such property. If a table has an IDENTITY field, TMSQuery uses it for updating. If a table does not have an IDENTITY field but has Primary Key, TMSQuery uses Primary Key fields for updating. If a table does not have an IDENTITY field and Primary Key, TMSQuery uses all fields for updating.