How to select item matching Only IN List in sql server

Question

How can one select only the items he want in the IN list? for example

select * from pagetags where TagID in (1,2,4)

Now I want all the page

Answer 1

The term for this type of problem is relational division. One way below.

SELECT PageID
FROM   pagetags
WHERE  TagID IN ( 1, 2, 4 )
GROUP  BY PageID
HAVING Count(DISTINCT TagID) = 3