For me, this worked with the following css expression:
::ng-deep .ui-datatable-scrollable-view .ui-datatable-scrollable-body {
min-height: 400px;
border: 1px solid #D5D5D5;
}
:: ng-deep targets inside the primeNg <p-dataTable> element. Minimum height: 0px of class ui-datatable-scrollable-body will be overwritten by your desired minimum height.
Instead of a css selector, two css selectors are used.
, , .
https://plnkr.co/edit/8cFrCY?p=preview