Question

有没有办法在不收到错误的情况下重写此查询？：子查询返回的值超过1。

这是查询用于表值函数中的LEFT JOIN。根据要求，我需要默认提取两个方案ID（如果参数值为NULL或为空）

DECLARE @pScenarioName AS VARCHAR(30)
select 
    externalID, 
    PropertyAssetId, 
    LeaseID, 
    BeginDate 
from ae11.dbo.ivw_Leases 
WHERE PropertyAssetID IN 
(select ID from AE11.dbo.PropertyAssets where scenarioID IN
(CASE WHEN isnull(@pScenarioName, '') = '' 
            THEN (select top 2 ID from rvw_Scenarios  where Name like '[0-9][0-9][0-9][0-9]%'
                    AND LEN(Name) = 8
                    order by Name desc)
            ELSE    
                (select ID from aex.dbo.rvw_Scenarios
                where [Name] IN (@pScenarioName))
          END)
)

Answer 1

我没有对此进行过测试，但在处理参数时我使用了类似的方法。当然，如果ID的顺序在您的第二个子查询中至关重要，这不一定有效。

SELECT   ExternalID
    ,PropertyAssetId
    ,LeaseID
    ,BeginDate 
FROM ae11.dbo.ivw_Leases 
WHERE PropertyAssetID IN 
    (SELECT ID 
        FROM AE11.dbo.PropertyAssets 
        WHERE scenarioID IN 
            (SELECT TOP 2 ID
                FROM rvw_Scenarios
                WHERE (@ISNULL(@pScenarioName,'') = ''
                        AND Name LIKE '[0-9][0-9][0-9][0-9]%'
                        AND LEN(Name) = 8)
                ORDER BY Name DESC
            UNION ALL 
            SELECT ID FROM aex.dbo.rvw_Scenarios
                WHERE  (@pScenarioName IS NOT NULL)
                    AND [Name] IN (@pScenarioName)))

避免子查询在表值函数中返回多于1个值的错误

1 个答案: