How to write a foreach in SQL Server?

Question

I am trying to achieve something along the lines of a for-each, where I would like to take the Ids of a returned select statement and use each of them.

DECLAR         


        

Answer 1

Suppose that the column PractitionerId is a unique, then you can use the following loop

DECLARE @PractitionerId int = 0
WHILE(1 = 1)
BEGIN
  SELECT @PractitionerId = MIN(PractitionerId)
  FROM dbo.Practitioner WHERE PractitionerId > @PractitionerId
  IF @PractitionerId IS NULL BREAK
  SELECT @PractitionerId
END