Check if field value updated on sql server trigger -


how can check field value updated in trigger:

alter trigger dbo.orderapprovedsms     on  dbo.[order]    after update  begin     set nocount on;      /*how can check approve date updated*/     if (/*approvedate updated*/)     begin        insert office.smssendbuffer                ( number ,                  body                 )        select 'xxxxxx','order approved!'     end  end

this simple ypu can use update function checking field value update.

alter trigger dbo.orderapprovedsms     on  dbo.[order]    after update  begin     set nocount on;      /*how can check approve date updated*/     if (update (approvedate))     begin        insert office.smssendbuffer                ( number ,                  body                 )        select 'xxxxxx','order approved!'     end  end

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