按字母数字字符串 MS SQL Server 2012 中的相似性排序

Question

我继承了一个使用 PHP 脚本访问 SQL Server 2012 数据库的项目。该应用程序允许用户输入多个参数并根据这些参数发出请求。

我遇到的问题是一个允许用户搜索 SKU 以字母数字字符串开头的项目的字段。

这是项目使用的查询：

SELECT top 10 IB.LocalSKU
, Cast(Round(IB.GoalMargin, 2) AS Decimal(10,2)) AS GoalMargin
, CASE WHEN IB.MAP = 0 THEN NULL ELSE IB.MAP END AS Min
, IB.ProductCost
, IB.ShippingEstimate
, EB.Price AS CurrentPrice


FROM intra.InventoryBase IB INNER JOIN intra.DropshipChannelAdvisorSKUs CA
  ON IB.LocalSKU = CA.LocalSKU
LEFT JOIN intra.eBayQoHFeedback EB
  ON CA.ChannelAdvisorSKU = EB.SKU

WHERE LOWER(IB.LocalSKU) LIKE LOWER('$localSKU%')
  AND LOWER(SupplierID) LIKE LOWER('%$supplierId%')
  AND LOWER(IB.Category) LIKE LOWER('%$category%')
  AND LOWER(IB.Dropship) LIKE LOWER('%$dropship%');

我注意到查询返回了正确的信息，但没有按照有用的顺序。

我不确定如何对其进行排序，以便 SKU 与 $localSKU 变量最匹配的行排在第一位。

我尝试了这个，但没有达到我希望的效果：

ORDER BY Difference(IB.LocalSKU, '$localSKU%') ASC

我也读过一些关于模糊字符串匹配的文章，但我不知道如何在这里实现它。

有没有有效的方法：

1. 搜索以给定字符串开头的 varchar
2. 根据该字符串的接近程度对结果进行排序，然后按值排序

预期结果：

参数：

$localSKU = "FMCPL1CY00"; 
$supplierId = 87; 
$category = "Premium Floor Liners"; 
$dropship = True;

预期结果：

--------------------------------------------------------------------------------
| FMCPL1CY00* | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
| FMCPL1CY01* | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
| FMCPL1CY02* | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
| FMCPL1CY03* | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
--------------------------------------------------------------------------------

实际结果：

-------------------------------------------------------------------------------------
| FMCPL1CH04221509 | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
| FMCPM1SA0021302  | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
| FMCPL1TY07801509 | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
| FMCPL1TY05721502 | GoalMargin | 0 | ProductCost | ShippingEstimate | CurrentPrice |
-------------------------------------------------------------------------------------

Answer 1

试试这个查询：

SELECT top 10 IB.LocalSKU
, Cast(Round(IB.GoalMargin, 2) AS Decimal(10,2)) AS GoalMargin
, CASE WHEN IB.MAP = 0 THEN NULL ELSE IB.MAP END AS Min
, IB.ProductCost
, IB.ShippingEstimate
, EB.Price AS CurrentPrice

,CASE WHEN IB.LocalSKU LIKE '$localSKU%' THEN 0  else 1 END as MyOrder

FROM intra.InventoryBase IB INNER JOIN intra.DropshipChannelAdvisorSKUs CA
  ON IB.LocalSKU = CA.LocalSKU
LEFT JOIN intra.eBayQoHFeedback EB
  ON CA.ChannelAdvisorSKU = EB.SKU

WHERE LOWER(IB.LocalSKU) LIKE LOWER('$localSKU%')
  AND LOWER(SupplierID) LIKE LOWER('%$supplierId%')
  AND LOWER(IB.Category) LIKE LOWER('%$category%')
  AND LOWER(IB.Dropship) LIKE LOWER('%$dropship%')

ORDER BY MyOrder ASC;

我希望它有所帮助。