What is meaning CRUD?

CRUD -> HTTP_METHOD -> SQL_Query

Create(write) -> POST -> INSERT

Read(read) -> GET -> SELECT

Update(modify) -> *PUT or PATCH -> UPDATE 

Usually used...

* PUT : All update

* PATCH : Partial update

Delete -> DELETE

I am use No "Delete query"

I actually used it like this... "UPDATE"

Modify column isDelete to "Y/N"

because, keep the data at the back end.