检查SQL查询中的条件不起作用

Question

我在SQL中有一个带有以下架构的表

SessionKey | FieldName         | FieldValue  
-----------+-------------------+------------
     1     | resroom_Adults    |      2  
     1     | resroom_Children  |      0  
     2     | resroom_Adults    |      4   
     2     | resroom_Children  |      0  
     3     | resroom_Adults    |      3  
     3     | resroom_Children  |      2

我正在尝试在查询中评估2个场景

1. fieldname ='res_adult'和fieldvalue＆gt; 3

2. fieldname ='res_adult'和fieldvalue＆gt; = 2且fieldname ='res_child'和fieldvalue＆gt; 2

如果满足任何条件，我的代码应该返回1，否则为0。

我的查询是

 IF Exists    
       (select * 
        from ReservationContractRulesObjectDefinitions 
        where sessionkey=@sessionkey 
        and ((FieldName = 'resroom_Adults' and fieldvalue > 3) 
              OR ((FieldName = 'resroom_Adults' and fieldvalue >=2) 
                   AND (FieldName = 'resroom_Children' and fieldvalue>2)
                  )
            )
       ) 
 begin select 1 End Else begin Select 0 End

在上面的查询中，仅检查第一个条件。
但是，从不检查第二个条件。
请有人帮助我。

Answer 1

我想你想要这样的东西：

select (case when max(case when FieldName = 'resroom_Adults' and fieldvalue > 3 then 1 else 0 end) > 0
             then 1
             when max(case when FieldName = 'resroom_Adults' and fieldvalue >= 2 then 1 else 0 end) > 0 and
                  max(case when FieldName = 'resroom_Children' and fieldvalue > 2 then 1 else 0 end) > 0
             then 1 
             else 0
        end)
from ReservationContractRulesObjectDefinitions 
where sessionkey = @sessionkey ;