Using data and expressions

[Sasank]

Iam trying to get some specific data from one column to other and trying to make it as mutiple select drop down but iam unable to make it

[graham_howe]

Drop-down from simple list of values | AppSheet Help Center and List from Table-Column Reference | AppSheet Help Center 

Edit to add as you want specific data then probably Slice Row Filter Conditions | AppSheet Help Center as well.