Variable as criteria

[N_R_D]

PHP Code:

SELECT         B.CALACT, B.CALDAT, B.CALTIM, B.CALOPR 
INTO         #uniquecalls2MONTHS
FROM         #UNIQUELOANSTOGETREPEATS AS A
JOIN         CONTACT.DBO.PHNLOG AS B ON (A.CALACT1=B.CALACT)
WHERE         B.CALACT >0
AND         B.CALDAT BETWEEN @startDate AND @60DayEnd
AND         B.CALTYP in (903)
AND         B.CALLOG IN ('C','T')
GROUP BY     B.CALACT, B.CALDAT, B.CALTIM, B.CALOPR 


I would like to have

PHP Code:

declare        @superVar varchar(50)
select         @superVar = 'CALTYP in (903)'

SELECT         B.CALACT, B.CALDAT, B.CALTIM, B.CALOPR 
INTO         #uniquecalls2MONTHS
FROM         #UNIQUELOANSTOGETREPEATS AS A
JOIN         CONTACT.DBO.PHNLOG AS B ON (A.CALACT1=B.CALACT)
WHERE         B.CALACT >0
AND         B.CALDAT BETWEEN @startDate AND @60DayEnd
AND         @superVar
AND         B.CALLOG IN ('C','T')
GROUP BY     B.CALACT, B.CALDAT, B.CALTIM, B.CALOPR 


Where

AND B.CALTYP in (903)

is

AND @superVar

How would I go about coding that?