Question

我有一个表，该表的一列中有多个值。我需要为每个值创建单独的行。我不知道该如何处理。我可以用逗号分隔列中的值，但此后我迷路了。欢迎任何建议。

表课程

    Name | Courses
--------------------------
    Kyle | Math, English, Science
    Joe  | Math, English

结果表

Name | Courses
-----------------------------
Kyle | Math
Kyle | English
Kyle | Science
Joe  | Math
Joe  | English

Answer 1

试试这个-

从-Here

获得的帮助

;WITH CTE (Name,Courses)
AS
(
    SELECT Name,Courses FROM Courses
),
tmp(Name, DataItem, Courses) 
AS
(
    SELECT
        Name,
        CAST(LEFT(Courses, CHARINDEX(',', Courses + ',') - 1) AS VARCHAR),
        STUFF(Courses, 1, CHARINDEX(',', Courses + ','), '')
    FROM CTE

    UNION all

    SELECT
        Name,
        CAST(LEFT(Courses, CHARINDEX(',', Courses + ',') - 1) AS VARCHAR),
        STUFF(Courses, 1, CHARINDEX(',', Courses + ','), '')
    FROM tmp
    WHERE
        Courses > ''
)

SELECT
    Name,LTRIM(RTRIM(DataItem)) Course
FROM tmp
ORDER BY Name

基于具有多个值的列的多个行

1 个答案: