Re: [firebird-support] Optimize query for date ranges

[Ann Harrison aharri...@ibphoenix.com [firebird-support]]

> On Oct 11, 2015, at 5:00 AM, 'Parzival' parzival1...@gmx.at 
> [firebird-support] <firebird-support@yahoogroups.com> wrote:
> i am running a simple query where the result contains 3 records. The query 
> should provide all records in a specific week.
> 
> 
>  
> 
> SELECT * FROM ARBEITSEINTEILUNG AS a where a.baustelle = '12345' AND WOCHE = 
> '2015-41';
> 
>  
> 
> Some times I dont have a week but two dates:
> 
>  
> 
> In this case – the very same number of records = 3 is the result set I see 
> that the table Arbeitseinteilung gots 42 reads.
> 
>  
> 
> SELECT * FROM ARBEITSEINTEILUNG AS a where a.baustelle = '12345' AND a.DATUM 
> >= '05.10.2015' AND a.DATUM <= '11.10.2015';
> 
> How can I improve the query?
> 

Do you have an index on DATUM?  What ate the plans for the two queries?

Good luck,

Ann