converting datetime for comparison

I am passing a datetime to a stored proc and I need to convert this
datetime to the format dd/mm/yyyy and then make a comparison between it
and a field in my select statement. Can somebody tell me what I am
doing wrong in my code?
declare @.Company varchar(50)
declare @.SerialNumber varchar(50)
declare @.ProductGroup varchar(10)
declare @.InstallationDate datetime
set @.Company = ''
set @.SerialNumber = ''
set @.ProductGroup = '9'
set @.InstallationDate = '21/03/2003 00:00:00'
select p.ProductID, c.Competitor, m.Machine, s.[name], p.SerialNumber,
p.InstallationDate,
t.ProductTypeID, t.[Description], convert(datetime,
left(p.InstallationDate, 11), 103),
convert(datetime, left(@.InstallationDate, 11), 103)
from Products p
inner join companysite s
on p.OwnedByCompanyID = s.CompanySiteKey
inner join Competitors c
on c.CompetitorID = p.ProducedByID
inner join CompetitorMachines m
on p.MachineID = m.CompetitorMachineID
inner join ProductTypes t
on t.ProductTypeID = m.ProductTypeID
where s.[name] like '%' + @.Company + '%'
and p.SerialNumber like '%' + @.SerialNumber + '%'
and t.ProductTypeID like '%' + @.ProductGroup + '%'
and convert(char(11), left(p.InstallationDate, 11), 103) =
convert(char(11), left(@.InstallationDate, 11), 103)
*** Sent via Developersdex http://www.examnotes.net ***"Mike P" wrote ...

> Can somebody tell me what I am doing wrong in my code?
A guess only...but..

> declare @.InstallationDate datetime
^^ a datetime
> set @.Company = ''
> set @.SerialNumber = ''
> set @.ProductGroup = '9'
> set @.InstallationDate = '21/03/2003 00:00:00'

> convert(char(11), left(@.InstallationDate, 11), 103)
char(11)
Perhaps the different data types is the problem?
Something else you could try which might help you achieve the same result
would be using the DATEDIFF function, if you are trying to find matches for
the same day, just use DATEDIFF, specify days, and look for where it equals
0 (ie, no days difference)..
Hope this helps..
Rob|||I have some best practices for datetime here: http://www.karaszi.com/SQLServer/in...
o_datetime.asp
Tibor Karaszi, SQL Server MVP
http://www.karaszi.com/sqlserver/default.asp
http://www.solidqualitylearning.com/
"Mike P" <mike.parr@.gmail.com> wrote in message news:e3zsKC2nGHA.3348@.TK2MSFTNGP03.phx.gbl.
.
>I am passing a datetime to a stored proc and I need to convert this
> datetime to the format dd/mm/yyyy and then make a comparison between it
> and a field in my select statement. Can somebody tell me what I am
> doing wrong in my code?
> declare @.Company varchar(50)
> declare @.SerialNumber varchar(50)
> declare @.ProductGroup varchar(10)
> declare @.InstallationDate datetime
> set @.Company = ''
> set @.SerialNumber = ''
> set @.ProductGroup = '9'
> set @.InstallationDate = '21/03/2003 00:00:00'
> select p.ProductID, c.Competitor, m.Machine, s.[name], p.SerialNumber,
> p.InstallationDate,
> t.ProductTypeID, t.[Description], convert(datetime,
> left(p.InstallationDate, 11), 103),
> convert(datetime, left(@.InstallationDate, 11), 103)
> from Products p
> inner join companysite s
> on p.OwnedByCompanyID = s.CompanySiteKey
> inner join Competitors c
> on c.CompetitorID = p.ProducedByID
> inner join CompetitorMachines m
> on p.MachineID = m.CompetitorMachineID
> inner join ProductTypes t
> on t.ProductTypeID = m.ProductTypeID
> where s.[name] like '%' + @.Company + '%'
> and p.SerialNumber like '%' + @.SerialNumber + '%'
> and t.ProductTypeID like '%' + @.ProductGroup + '%'
> and convert(char(11), left(p.InstallationDate, 11), 103) =
> convert(char(11), left(@.InstallationDate, 11), 103)
>
> *** Sent via Developersdex http://www.examnotes.net ***|||>I am passing a datetime to a stored proc and I need to convert this
> datetime to the format dd/mm/yyyy and then make a comparison between it
> and a field in my select statement. Can somebody tell me what I am
> doing wrong in my code?
Well, what is the problem? Do you get an error message, or is it not
returning any rows? Could you give us DDL, sample data, and desired results
as per http://www.aspfaq.com/5006 ?