sql - 选择最新条目的Id，值为***

Question

我需要获取包含值的条目的 ID。

这是我用过的:

SET @ValuationId = (SELECT ValuationId FROM dbo.Valuation WHERE ValuationPropertyId = @ValuationPropertyId)

上面的问题是它选择了多个值，我可以用什么来让它选择最新的值？

这是我收到的错误消息:

Msg 512, Level 16, State 1, Procedure GetLatestValuationOfPropIdThenCallUpdateComparibleSalesInfo, Line 15 Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

Answer 1

使用MAX()

SET @ValuationId = (SELECT MAX(ValuationId) 
                    FROM   dbo.Valuation
                    WHERE  ValuationPropertyId = @ValuationPropertyId)

或

SET @ValuationId = (SELECT TOP 1 ValuationId
                    FROM   dbo.Valuation
                    WHERE  ValuationPropertyId = @ValuationPropertyId
                    ORDER  BY ValuationId DESC)