选择更好的SQL server查询计划以减少服务器I/O和RAM使用

对于我的SQL server数据库，我编写了两个SQL脚本以获得相同的输出。两者的计划大相径庭。我不明白该用哪一个

有人可以查看附带的SQL计划映像（Plan1和Plan2）并帮助我选择正确的映像吗？我的要求是减少这些进程对服务器I/O和RAM的使用

以下是SQL查询：

计划1：

DECLARE @SellerLocationId INT = 5
SELECT (CASE WHEN LOWER(mfn_listing_exists) = 'yes' THEN IsInStock ELSE (CASE WHEN (afn_fulfillable_quantity > 0) THEN 1 ELSE 0 END) END) AS IsInStock
FROM ( select
sku,mfn_listing_exists,mfn_fulfillable_quantity,afn_fulfillable_quantity
 from rptFBA_ManageInventoryResponse
 where SellerLocationId = @SellerLocationId AND LOWER(condition) not in ('unknown','')
 )tvp
 LEFT OUTER JOIN ProductAmz p ON p.SKU = tvp.SKU AND p.SellerLocationId = @SellerLocationId
 where p.SKU = tvp.SKU AND p.SellerLocationId = @SellerLocationId

计划二：

DECLARE @SellerLocationId INT = 5
SELECT (CASE WHEN (afn_fulfillable_quantity > 0) THEN 1 ELSE 0 END) AS IsInStock
FROM ( select
sku,mfn_listing_exists,mfn_fulfillable_quantity,afn_fulfillable_quantity
 from rptFBA_ManageInventoryResponse
 where SellerLocationId = @SellerLocationId AND LOWER(condition) not in ('unknown','') AND LOWER(mfn_listing_exists) = 'yes'
 )tvp
 LEFT OUTER JOIN ProductAmz p ON p.SKU = tvp.SKU AND p.SellerLocationId = @SellerLocationId
 where p.SKU = tvp.SKU
 AND p.SellerLocationId = @SellerLocationId

---

谢谢。

我认为第二个方案比第一个方案要好，因为第一个方案的密钥查找成本为25%，密钥查找比索引扫描慢，比索引查找慢。因此，与其依赖于键查找，不如依赖于索引扫描。并分析该表可用的索引

rptFBA\u ManageInventoryResponse

，检查创建索引以提高性能的可能性。

非常感谢您的宝贵响应。我将尝试在该表上创建索引。