thank you first for all ur efforts in this site .
we all know execute .. im asking about execute --> transferring the data from the database to the datasource .. for example if you are transferring data from value entry-navision to the project valueentry_JetEnterprise .Do everytime it will execute it will retrieve from 1st entry? . how can we only retrieve the addtional or updated data ? because its a long period if everytime will retrieve from 1st enty.