sql server - date filtering in dynamic SQL -

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set @vsqlfilters = '(abra.start_date !> ' + cast(@denddate varchar(26)) + ' or abra.end_date !< ' + cast(@dstartdate varchar(26)) + ')';

i want parameters @dstartdate , @denddate keep quotes around them. currently, they're typed in manually end user quotes around them. right now, get

(abra.start_date !> 2013-05-01 or abra.end_date !< 2011-04-05) in query instead of 

(abra.start_date !> '2013-05-01' or abra.end_date !< '2011-04-05').

since thrown dynamic sql query, need @denddate , @dstartdate cast strings. want treat dstartdate , denddate dates not integers. don't see how can sql compare dates.

thanks!

put doubled-up single quotes anywhere within statement want single quote appear:

set @vsqlfilters = '(abra.start_date !> ''' + cast(@denddate varchar(26)) + ''' or abra.end_date !< ''' + cast(@dstartdate varchar(26)) + ''')';

however, there no need this. sp_executesql can use parameters:

declare @sql nvarchar(max); set @sql = 'select * dbo.abra abra abra.start_date <= @denddate' + ' , abra.end_date >= @dstartdate'; exec sp_executesql @sql, n'@dstartdate datetime, @denddate datetime', @dstartdate, @denddate;

this is, in mind, better practice. may offer better performance through execution plan reuse (or may not).

i recommend not use inequality operators !, !<, , !>. make hard others read , comprehend code. use <>, >=, , <=.

last, sure wanted or in filter? may missing something.


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