Microsoft TSQL将文本行更改为列

Question

我想将包含一列的20行更改为包含20列的1行，以便稍后将其插入第二个数据库

Name
----------
- Frank
- Dora
- ...
- Michael

到

Name1 | Name2 | ... | Name20
Frank | Dora  | ... | Michael

我试过

SELECT * 
FROM  (SELECT TOP 20 firstname AS NAME 
       FROM   database) AS d 
      PIVOT (Min(NAME) 
            FOR NAME IN (name1, 
                         name2, 
                         name3, 
                         name4, 
                         name5, 
                         name6, 
                         name7, 
                         name8, 
                         name9, 
                         name10, 
                         name11, 
                         name12, 
                         name13, 
                         name14, 
                         name15, 
                         name16, 
                         name18, 
                         name19, 
                         name20) ) AS f 

但所有名字都是NULL。 DEMO

Answer 1

你很接近......但你的内部选择必须带有新的列名。试试这样：

DECLARE @tbl TABLE(Name VARCHAR(100));
INSERT INTO @tbl VALUES('Frank'),('Dora'),('Michael');

SELECT p.*
FROM
(
    SELECT 'Name' + CAST(ROW_NUMBER() OVER(ORDER BY Name) AS VARCHAR(150)) AS ColumnName
          ,Name
    From @tbl
) AS tbl
PIVOT
(
    MIN(Name) FOR ColumnName IN(Name1,Name2,Name3)
) AS p