tsql computed function not responding with huge record
i have create new column and i have add this function
CASE DATEPART(WEEKDAY,datetimein) WHEN 1 THEN 'SU' WHEN 2 THEN 'MO' WHEN 3 THEN 'TU' WHEN 4 THEN 'WE' WHEN 5 THEN 'TH' WHEN 6 THEN 'FR' WHEN 7 THEN 'SA' END