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  3. May 2012

Re: Index over join tables

You don't explicitly use an index with a view - the query optimizer will
determine which indexes to use based on selection criteria and ordering for
queries utilizing the view.

Table A, Columns A1, A2, A3, Index on A1
Table B, Columns B1, B2, B3, Index on B1
Create view myview as select a1, a2, a3, b1, b2, b3 from a join b on (a1 =
b1). No index used here.
Select * from myview where A1 in (1,2,3). Index used here to select rows
due to selection criteria.

--Loyd




On Fri, May 11, 2012 at 9:31 AM, Raul A. Jager W. <raul@xxxxxxxxxx> wrote:

Using DDS I can create a "view" that has an index and some data from one
table and data from other joined tables.

Can I do the same using SQL? at V7.1

TIA
Raúl


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