相关嵌套查询的查询优化（SQL Server）

Question

在相关嵌套查询中只有WHERE子句或外部查询中只有WHERE子句，性能是好还是坏？ex：下面的嵌套查询定义price_key，但外部查询引用了price_key也在外部查询WHERE语句

中定义

INNER JOIN (
            SELECT inv.item_key, s.price_key, MAX(inv.last_receive_cost / inv.last_receive_units_case) AS [unit_cost]
            FROM inventory inv
                  INNER JOIN stores s on inv.location_key = s.store_key
            WHERE inv.on_hand_inventory_qty > 0
                  AND inv.last_receive_cost > 0
                  AND inv.last_receive_units_case > 0
                  AND s.price_key = (29)
            GROUP BY inv.item_key, s.price_key
) t ON r.item_key = t.item_key and r.price_key = t.price_key

Answer 1

GHCi, version 7.10.3: http://www.haskell.org/ghc/  :? for help

Prelude> 2^74207281 - 1