Re: Better SQL performance than SUBSTRING

No it wouldn't...

Views have no effect on performance...they are "performance neutral" as IBM
says.

Charles

On Fri, May 4, 2018 at 9:08 AM, Dan <dan27649@xxxxxxxxx> wrote:

I've never done this for performance reasons and this is just a WAG, but
what about creating a view that includes a new field that is a substring
per your example? It would still be a substring, but would performance be
better since it's defined in a view?

- Dan

On Fri, May 4, 2018 at 10:16 AM, Justin Taylor <JUSTIN@xxxxxxxxxxxxx>
wrote:

I know that a LIKE performs better than a SUBSTRING in a SQL WHERE
clause. Is there a better option than a SUBSTRING for checking specific
positions in a column?

Given MY_TABLE with MY_COLUMN defined as char(12) and this query:
Select *
From MY_TABLE
Where substring(MY_COLUMN, 5, 6) = '123456';

Is there an alternative to SUBSTRING that will perform better?

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