如何在SQL Server存储过程中筛选包含最大Created日期的记录?
问题描述
我有以下数据表:
- Charges(
IdChargesIDENTITY(1,1),PRNVarchar(10),CreatedDateTime,SeasonCodeVarchar(10)); - Sales(
IdSalesIDENTITY(1,1),PRNVarchar(10)); - Bounty(
IdBountyIDENTITY(1,1),BountyTranvarchar(10));
用于插入示例数据的SQL代码:
INSERT INTO Charges VALUES ('111','2023-06-01','10.1'); INSERT INTO Charges VALUES ('222','2023-06-02','10.2'); INSERT INTO Charges VALUES ('333','2023-06-03','10.3'); INSERT INTO SALES VALUES ('111'); INSERT INTO SALES VALUES ('222'); INSERT INTO SALES VALUES ('333'); INSERT INTO Bounty VALUES ('WWW'); INSERT INTO Bounty VALUES ('DDD'); INSERT INTO Bounty VALUES ('FFF');
我还有如下存储过程:
ALTER PROCEDURE [dbo].[spGetCharges] @StartDate DATETIME AS BEGIN SELECT K.Bounty AS BountyTran 'C' AS CODE, LEFT(C.SeasonCode, CHARINDEX('.', C.SeasonCode + '.') - 1) AS SCODE FROM dbo.Sales S INNER JOIN dbo.Charges C ON S.PRN = C.PRN INNER JOIN dbo.Bounty B ON S.IdBounty = B.IdBounty AND C.Created >= @StartDate END
我需要修改存储过程,筛选出C.Created日期最大的对应记录。例如:执行存储过程传入参数'2023-06-02'时,输出应为('DDD', '10', '2023-06-03')、('FFF', '10', '2023-06-03')。
内容的提问来源于stack exchange,提问作者BlackCat
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