sql查询以获得给定输入的数据的最大匹配

Question

根据给定的输入，需要应用条件来获取下表中的最大匹配分数

MATCH_RULES

示例：

if FN=Y&LN=Y&EMAIL=Y&TAX=Y&DOB=Y&MOBILE=Y 
then id=1 and match_score=100

if FN=Y&LN=Y&EMAIL=Y&TAX=N&DOB=N&MOBILE=Y
then id=5 and match_score=40 

作为给定输入的结果，需要获取高匹配分数满意记录

Answer 1

你可以在

时使用案例

    select case when 
          (FN='Y' AND LN='Y' AND EMAIL ='Y' AND TAX='Y' 
                AND DOB = 'Y' AND MOBILE ='Y') THEN 1 
            when 
           (FN='Y' AND LN='Y' AND EMAIL ='Y' AND TAX='N' 
                AND DOB = 'N'AND MOBILE ='Y') THEN 5 
           end id , 
    case when 
          (FN='Y' AND LN='Y' AND EMAIL ='Y' AND TAX='Y' AND DOB = 'Y' AND MOBILE ='Y') THEN 100
            when 
           (FN='Y' AND LN='Y' AND EMAIL ='Y' AND TAX='N' AND DOB = 'N'AND MOBILE ='Y') THEN 40
           end match_Score       

    from my_table   

Answer 2

在SQL查询中，您可以使用max()函数来获取列的最大值。在您的情况下，您可以输入类似的内容：

SELECT max(match_score)
FROM ?
WHERE FN = 'Y' and ...