DSXchange

Is it possible to export all the jobs ,table definitions and other items which were created or updated after a specific day?

Yes.

In Designer open Advanced Find. Specify * in the "Name to find" field. Open the "Last modified" option and enter your date range in the "Within a specific period". Open the "Creation" option and enter the same date range.

Click Find.

In the Results pane select the items you want to export, right click and choose Export from the menu. The rest (the Export dialog) should be familiar.

Thank you so much.
And can we use command line, shell script to do such export?