Also, if the table has a clustered index (Sybase/SQL Server) or the table is index organized (Oracle) or somesuch, there is no extra disk IO to read the row data.

(From your description with 2 physical reads, it sounds like you used a clustered PK index.)

In reply to Re^2: Hash lookups, Database lookups, and Scalability by jplindstrom
in thread Hash lookups, Database lookups, and Scalability by davido

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