Prøv følgende forespørgsel:
SELECT STRAIGHT_JOIN item_id
FROM (
SELECT DISTINCT search_id
FROM mtrt_searches_groups
WHERE client_id = 1
) JOIN mtrt_items_searches USING(search_id)
LIMIT 0,350000
Prøv følgende forespørgsel:
SELECT STRAIGHT_JOIN item_id
FROM (
SELECT DISTINCT search_id
FROM mtrt_searches_groups
WHERE client_id = 1
) JOIN mtrt_items_searches USING(search_id)
LIMIT 0,350000