SSRS parms for SQL Query

I ned advise on how to best set up parms in the SSRS and the SQL for the following WHERE clause in my Query.  The year date is the problem here.  I get a value of 2013 from my dropdown and need to pass into the SQL.  And so I can set up the next parm to  be the current year minus 90 days.
I'm stuck on how to declare and concatenate the values in the SQL

here is the where:

(m1.MemberEffectiveDate between '01-01-2013' and '12-31-2013'
m1.MemberEffectiveDate between '10-03-2012' and '12-31-2012'
and (j2.dateofcompletion not between '10-03-2012' and '12-31-2012'  
or j2.dateofcompletion is null)

thinking out loud i need a @jan = '01-01-' and concatenate to the @year but how??
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Brian CroweDatabase AdministratorCommented:
@jan = CONVERT(DATETIME, CAST(@year AS VARCHAR) + '0101', 112)
Brian CroweDatabase AdministratorCommented:
also you can replace

m1.MemberEffectiveDate between '01-01-2013' and '12-31-2013'


YEAR(m1.MemberEffectiveDate) = @year
for retention of indexes in the query execution it is safer to avoid applying functions to the data (to suit the parameters) - instead it is generally a better approach to do the reverse and adjust the parameters to suit the data.

+Currently you are using "between" - and I suspect this will be a hard sell, but "between" is not the best of options for a date range. see: "Beware of Between"

BriCrowe has already provided how to use the year parameter, so I would suggest the equivalent of this:
@start = convert(datetime, cast(@year AS varchar) + '0101', 112)


 (    m1.MemberEffectiveDate>= @start 
  AND m1.MemberEffectiveDate < dateadd(year,1,@start )  -- nb: less than only
    (     m1.MemberEffectiveDate >= dateadd(day,90,@start)
      AND m1.MemberEffectiveDate  < dateadd(year,1,@start )   -- nb: less than only
       (      j2.dateofcompletion < dateadd(day,90,@start)  -- nb: less than only
          AND j2.dateofcompletion >= dateadd(year,1,@start ) 
     OR j2.dateofcompletion is null

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I realize this may appear more complex, but it is "sargable" and often to achieve that the sql looks harder, but the execution is simpler.

Rules of thumb
Avoid functions using table values in a sql condition.
Avoid non-sargable predicates and replace them with sargable equivalents.

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rschmehlAuthor Commented:
Thanks, I got it
Thanks for the grading. Cheers, Paul
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