Loop through a column of a table using the row count in sqlserver

Question

Here i have a table called consumer which has 23 rows. from this table i need to take the consumerid from this table and loop this consumerid and pass the value to another select query like a foreach loop in c#. I tried like this

declare @Id int
While (Select Count(*) From Consumer) > 0
Begin
    Select Top 1 @Id = consumerid From Consumer

  SELECT childid FROM CHILD where consumerid=@Id 
End

any suggestion?

Answer 1

Not sure what is your end goal, but here are 2 approaches:

1. Use cursor to loop through each id

2. You need not to loop through, rather use inner join

   SELECT ChildId FROM CHILD inner join Consumer ON child.Consumerid = consumer.consumerid