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Saving date and time and getting date
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À
24/02/2010 05:55:41
Metin Emre
Ozcom Bilgisayar Ltd.
Istanbul, Turquie
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Conception bases de données
Divers
Thread ID:
01450712
Message ID:
01450749
Vues:
49
>Hi All,
>
>I will create a datetime field. I'll save date and time to it. I need date and time and have filtering just date part. Should I create an index like;
>
>CONVERT(char(10),mydate,112)
>
>and use;
>vfp:
>xmydate=dtoc(date(),1)
>sql server:
>where convert(char(10),mydate,112)=?xmydate
>
>for performance
>
>or is just an index with mydate is enough for performance;
>
>vfp:
>xmydate=date()
>sql server:
>where mydate=?xmydate

Metin,

In SQL Server you can not create an index using a function. Use a date range when looking for a date, e.g.
select * from myTable where DateField >=@Today and DateField < @Tomorrow
See these links for working with dates:

The ultimate guide to the datetime datatypes

http://sqlblog.com/blogs/aaron_bertrand/archive/2009/10/16/bad-habits-to-kick-mishandling-date-range-queries.aspx

and also

http://wiki.lessthandot.com/index.php/Date_Range_WHERE_Clause_Simplification
If it's not broken, fix it until it is.


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