SQL性能

我有数据表，比如

角色定位

合同角色

我只想去拿

RL2
RL3
RL4

所以，我在下面写的查询运行良好，但我怀疑它是否会运行良好。。谢谢你的帮助。谢谢

SELECT 
    RL.ROLE_LOCATION_ID 
FROM 
    ROLELOCATION RL, contractrole CR
WHERE 
    CR.CONTRACT_ROLE_ID = RL.CONTRACT_ROLE_ID
    AND CR.CONTR_COMPONENT_ID = policy1
    AND RL.LOCATION_GROUP_ID NOT IN (SELECT RL2.LOCATION_GROUP_ID 
                                     FROM ROLELOCATION RL2,CONTRACTROLE CR2 
                                     WHERE RL2.CONTRACT_ROLE_ID = CR2.CONTRACT_ROLE_ID 
                                     AND CR2.CONTR_COMPONENT_ID <> policy1)

---

以下是执行查询的方法：

select role_location_id
from (SELECT RL.ROLE_LOCATION_ID,
             sum(case when cr.policy <> 'policy1' then 1 else 0 end) over (partition by rl.location_group_id) as NumNotPolicy1
      FROM ROLELOCATION RL join
           contractrole CR
           on CR.CONTRACT_ROLE_ID = RL.CONTRACT_ROLE_ID
     ) t
where NumNotPolicy1 = 0

---

这统计非保单1在位置组级别出现的次数。它只选择计数为0的行。

发布包含索引的模式，并发布解释的结果。如果您只是怀疑它是否运行良好。。为什么不测试一下它的性能呢20多年前，ANSI-92 SQL标准已经停止使用老式的逗号分隔表列表样式！您使用的是哪种数据库管理系统？博士后？神谕

SELECT 
    RL.ROLE_LOCATION_ID 
FROM 
    ROLELOCATION RL, contractrole CR
WHERE 
    CR.CONTRACT_ROLE_ID = RL.CONTRACT_ROLE_ID
    AND CR.CONTR_COMPONENT_ID = policy1
    AND RL.LOCATION_GROUP_ID NOT IN (SELECT RL2.LOCATION_GROUP_ID 
                                     FROM ROLELOCATION RL2,CONTRACTROLE CR2 
                                     WHERE RL2.CONTRACT_ROLE_ID = CR2.CONTRACT_ROLE_ID 
                                     AND CR2.CONTR_COMPONENT_ID <> policy1)

select role_location_id
from (SELECT RL.ROLE_LOCATION_ID,
             sum(case when cr.policy <> 'policy1' then 1 else 0 end) over (partition by rl.location_group_id) as NumNotPolicy1
      FROM ROLELOCATION RL join
           contractrole CR
           on CR.CONTRACT_ROLE_ID = RL.CONTRACT_ROLE_ID
     ) t
where NumNotPolicy1 = 0