列值轉換為逗號分隔字元串

將數據表的某一列值，轉換為逗號分隔字元串：

先準備一些數據：

DECLARE @t AS TABLE([Datas] NVARCHAR(40))
INSERT INTO @t ([Datas]) VALUES(N'DF'),(N'W4F'),(N'EYY'),(N'ER'),(N'GFF'),(N'A445')

SELECT [Datas] FROM @t ORDER BY [Datas]

一二句SQL代碼的事：

DECLARE @CommaDelimitedString NVARCHAR(MAX)
SELECT @CommaDelimitedString = ISNULL(@CommaDelimitedString + ',', '') + [Datas] FROM @t ORDER BY [Datas]
SELECT @CommaDelimitedString