我不知道如何使用 string_agg 进行订购

Question

我有这个查询（我正在使用 SQL Server 2019）并且工作正常（将日期和注释合并到一列中）。但是，我要查找的结果是首先显示最新日期。

如何从这个查询中实现？

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

我试过 ORDER BY 但没有用这是我的 table:

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;

我不知道如何使用 string_agg 进行订购

I can't figure out how to Order by with string_agg

string-aggregation