Question

请参阅下面的SQL DDL：

create table dbo.Test(id int, name varchar(30))

INSERT INTO Test values (1, 'Mark') 
INSERT INTO Test values (2,'Williams')

我想回归：＆＃39; Mark Williams＆＃39;使用SQL SELECT。我尝试过使用SQL Pivot，但它没有用。

Answer 1

试试这个：

DECLARE @Return VARCHAR(MAX)

SELECT @Return = COALESCE(@Return+' ','') + name
FROM dbo.TEST

SELECT @Return

Answer 2

DECLARE @NameList VARCHAR(8000) 
SELECT @NameList = COALESCE(@NameList + ' ', '') + Name 
FROM Test
SELECT @NameList

了解更多COALESCE

Answer 3

可能比COALESCE更灵活地使用STUFF和FOR XML模式：

SELECT TOP 1
       STUFF((SELECT ' ' + Name AS [text()]
                FROM dbo.Test 
               ORDER BY id
                 FOR XML PATH('')), 1, 1, '' ) Concatenated
 FROM TEST

将两行作为单行返回

3 个答案: