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  2. RPG400-L
  3. August 2024

Re: Embedded sql how to test for no lines

On 8/28/2024 1:48 AM, Birgitta Hauser wrote:
SELECT DISTINCT is a grouping, i.e. costs additional performance.
Just a simple SELECT to read the first row that machtes the search criteria
is the best solution!!!
Correct. You should not use COUNT() as an existence test. You should only use COUNT() if one non-zero value has a different meaning in terms of business logic than another non-zero value. If all you want to know is if there is at least one row, then do SELECT...LIMIT 1. If you get a return value, you do one thing; if not, you do something else.

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