What’s better for changes to a table for many records : DELETE and INSERT every time or UPDATE existing?

QuestionsCategory: TechnologyWhat’s better for changes to a table for many records : DELETE and INSERT every time or UPDATE existing?
Roboto asked 3 months ago

What’s better for changes to a table for many records : DELETE and INSERT every time or UPDATE existing?
If I have to update as 20 rooms are not in a hotel now.
In That case what is better?
Should I delete all the records against & Insert New Records??
or
Just Update the Existing records & Other left data just Insert?? 
If I delete Every time & Insert New Records, then Primary key always increment.