you could also do this –
, SUM(CASE WHEN d.dec = 4
THEN COALESCE(DATEDIFF(d.date2,d.date1)
,DATEDIFF(CURDATE(),d.date1)) END) AS tD_plus_oD
you could also do this –
, SUM(CASE WHEN d.dec = 4
THEN COALESCE(DATEDIFF(d.date2,d.date1)
,DATEDIFF(CURDATE(),d.date1)) END) AS tD_plus_oD