SQL LOOP INSERT Based on List of ID's

Question

Hey I have SQL writers block. So here is what I'm trying to do based on pseudo-code

int[] ids = SELECT id FROM (table1) WHERE idType = 1 -> Selecting a bunch of record ids to work with
FOR(int i = 0; i <= ids.Count(); ++i) -> loop through based on number of records retrieved
{
    INSERT INTO (table2)[col1,col2,col3] SELECT col1, col2, col3 FROM (table1)
    WHERE col1 = ids[i].Value AND idType = 1 -> Inserting into table based on one of the ids in the array

    // More inserts based on Array ID's here
}

This is sort of the idea I'm trying to achieve, I understand that arrays are not possible in SQL but I've listed it here to explain my goal.

Answer 1

INSERT INTO table2
(
    col1,
    col2,
    col3
)
SELECT 
    table1.col1, 
    table1.col2, 
    table1.col3
FROM table1
WHERE table1.ID IN (SELECT ID FROM table1 WHERE table1.idType = 1)

Answer 2

This is what you are asking for.

declare @IDList table (ID int)

insert into @IDList
SELECT id
FROM table1
WHERE idType = 1

declare @i int
select @i = min(ID) from @IDList
while @i is not null
begin
  INSERT INTO table2(col1,col2,col3) 
  SELECT col1, col2, col3
  FROM table1
  WHERE col1 = @i AND idType = 1

  select @i = min(ID) from @IDList where ID > @i
end

But if this is all you are going to do in the loop you should really use the answer from Barry instead.

Answer 3

You can just use:

Insert Into Table2 (Col1, Col2, Col3)
Select col1, Col2, Col3
From Table1
Where idType = 1

Why would you even need to loop through each id individually