Question

I need an sql query that will retrieve all items that have both tags, not any of tags. I already have a query but returns all items that hove both tags, not expected result. Find detailed description below. Thanks!

Table structure:

ITEMS TABLE ------------ item_id item_name  TAGS TABLE ---------- tag_id tag_name  ITEMTAGS TABLE --------------- tag_id item_id 

Query:

SELECT Items.* FROM Items  INNER JOIN ItemTags ON Items.item_id = ItemTags.item_id WHERE ItemTags.tag_id IN (T1, T2) GROUP BY Items.item_id 

Result: All items that have T1 or T2

Expected result: All items that have both T1 and T2

Answer 1

select i.* from items i, itemtags it1, itemtags it2 where i.item_id=it1.item_id and it1.tag_id=T1 and i.item_id=it2.item_id and it2.tag_id=T2;