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View of a view

 
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danm
Intermediate


Joined: 29 Jun 2004
Posts: 170
Topics: 73

PostPosted: Thu Nov 19, 2015 12:36 pm    Post subject: View of a view Reply with quote

I need to create a view joining tableA, Tableb, TableC and TableD. If there is alreay an exising ViewX joining tableA and TableB, I can create a view joining ViewX, TableC and TableD. Will the performance degrade on view of a view?
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kolusu
Site Admin
Site Admin


Joined: 26 Nov 2002
Posts: 12357
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Location: San Jose

PostPosted: Thu Nov 19, 2015 12:44 pm    Post subject: Re: View of a view Reply with quote

danm wrote:
I need to create a view joining tableA, Tableb, TableC and TableD. If there is alreay an exising ViewX joining tableA and TableB, I can create a view joining ViewX, TableC and TableD. Will the performance degrade on view of a view?


Danm,

As long as the views are only used for reading the data without any INSERT/UPDATE/DELETE you will not have a performance degradation even if you create a view based of another view.

Kolusu
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danm
Intermediate


Joined: 29 Jun 2004
Posts: 170
Topics: 73

PostPosted: Thu Nov 19, 2015 1:36 pm    Post subject: Reply with quote

Kolusu,
Thanks.
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