SQL - Subtract Date with Integer -


i have document has "delivery date" , "days deliver" fields calculate "dispatch date" = "delivery date" subtract "days deliver"

currently i'm trying:

dbo.t0.docduedate-dbo.crd1.daystodeliver

am getting datetime format error above. getting wrong?

assuming using sql server, use sql function dateadd().
first parameter d stands day.
second parameter how many days want add , putting minus (-) in front instead of adding subtracts value.
last parameter initial date want manipulated.
might need cast input values appropriate types - second parameter has integer.

select dateadd(d,-[daystodeliver], [deliverydate]) 'dispatch date' [table]

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