我不知道如何使用 string_agg 进行排序

Question

我有这个查询（我使用的是 SQL Server 2019）并且工作正常（将日期和注释组合成一列）。但是，我正在寻找的结果是首先显示最新日期。

我怎样才能从这个查询中实现这一点？

SELECT ID,            

​(SELECT string_agg(​concat(Date, ': ', Notes), CHAR(13) + CHAR(10) + CHAR(13) + CHAR (10)) as Expr1​

    FROM(SELECT DISTINCT nd.Notes, nd.Date
    FROM dbo.ReleaseTrackerNotes AS nd 
    INNER JOIN dbo.ReleaseTracker AS ac4 ON ac4.ID = nd.ReleaseTrackerID
    WHERE (ac4.ID = ac.ID)) AS z_1) AS vNotes 

FROM dbo.ReleaseTracker AS ac

GROUP BY ID

我尝试了 ORDER BY 但没有用 这是我的桌子：

CREATE TABLE [dbo].[ReleaseTrackerNotes](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [ReleaseTrackerID] [int] NULL,
    [AOC_ModelID] [int] NULL,
    [Date] [date] NULL,
    [Notes] [nvarchar](800) NULL,
 CONSTRAINT [PK_ReleaseTrackerNotes] PRIMARY KEY CLUSTERED 

CREATE TABLE [dbo].[ReleaseTracker](
    [ID] [int] IDENTITY(1,1) NOT NULL,
    [AOC_ModelID] [int] NOT NULL,
    [MotherboardID] [int] NOT NULL,
    [StatusID] [int] NOT NULL,
    [TestCateoryID] [int] NULL,
    [TestTypeID] [int] NULL,
    [DateStarted] [date] NULL,
    [DateCompleted] [date] NULL,
    [LCS#/ORS#] [nvarchar](20) NULL,
    [ETCDate] [date] NULL,
    [CardsNeeded] [nvarchar](2) NULL,
 CONSTRAINT [PK_Compatibility] PRIMARY KEY CLUSTERED 

Answer 1

使用WITHIN GROUP (ORDER BY ...):

SELECT
    ID,            
    STRING_AGG(​TRY_CONVERT(varchar, Date, 101) + ': ' + Notes +
               CHAR(13) + CHAR(10) + CHAR(13), CHAR(10))
        WITHIN GROUP (ORDER BY Date DESC) AS Expr1​
FROM
(
    SELECT DISTINCT ac4.ID, nd.Notes, nd.Date
    FROM dbo.ReleaseTrackerNotes AS nd 
    INNER JOIN dbo.ReleaseTracker AS ac4
        ON ac4.ID = nd.ReleaseTrackerID
) AS vNotes
GROUP BY ID;