Multiple Key access in Quick.
Rob Lobbe
rlobbe@vic.bigpond.net.au
Sat, 17 Jul 1999 11:31:35 +1000
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Santo,
Depending on the HIT rate on the file you may be able to add an =
additional INDEX that includes both FIELD1 and FIELD2 as segments. There =
is a small -performance-overhead in writing (updating) records as the =
INDEX may need to be updated as well.
With a relational database, this is irrelevant, Indices may -or may not- =
be used. Use your first example. The database will workout the best =
retrieval.
Rob Lobbe
Practice Manager
Praxa Ltd
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<DIV><FONT size=3D2>Santo,</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Depending on the HIT rate on the file you =
may be=20
able to add an additional INDEX that includes both FIELD1 and FIELD2 as=20
segments. There is a small -performance-overhead in writing (updating) =
records=20
as the INDEX may need to be updated as well.</FONT></DIV>
<DIV><FONT size=3D2></FONT> </DIV>
<DIV><FONT size=3D2>With a relational database, this is irrelevant, =
Indices may=20
-or may not- be used. Use your first example. The database will workout =
the best=20
retrieval.</FONT></DIV>
<DIV> </DIV>
<DIV><FONT size=3D2>Rob Lobbe</FONT></DIV>
<DIV><FONT size=3D2>Practice Manager</FONT></DIV>
<DIV><FONT size=3D2>Praxa Ltd</FONT></DIV></BODY></HTML>
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