使用 FOR XML PATH 进行字符串连接时避免实体化字符

Question

我有这个查询：

SELECT DISTINCT
    f1.CourseEventKey,
    STUFF
    (
        (
            SELECT
                '; ' + Title
            FROM
            (
                SELECT DISTINCT
                    ces.CourseEventKey,
                    f.Title
                FROM
                    CourseEventSchedule ces
                INNER JOIN Facility f 
                    ON f.FacilityKey = ces.FacilityKey
                WHERE
                    ces.CourseEventKey IN 
                    (
                        SELECT CourseEventKey
                        FROM @CourseEvents
                    )
            ) f2
            WHERE
                f2.CourseEventKey = f1.CourseEventKey
            FOR XML PATH('')
        )
    , 1, 2, '')
FROM
(
    SELECT DISTINCT
        ces.CourseEventKey,
        f.Title
    FROM
        CourseEventSchedule ces
    INNER JOIN Facility f 
        ON f.FacilityKey = ces.FacilityKey
    WHERE
        ces.CourseEventKey IN 
        (
            SELECT CourseEventKey
            FROM @CourseEvents
        )
) f1;

它产生这个结果集：

SELECT DISTINCT
    f1.CourseEventKey,
    STUFF
    (
        (
            SELECT
                '; ' + Title
            FROM
            (
                SELECT DISTINCT
                    ces.CourseEventKey,
                    f.Title
                FROM
                    CourseEventSchedule ces
                INNER JOIN Facility f 
                    ON f.FacilityKey = ces.FacilityKey
                WHERE
                    ces.CourseEventKey IN 
                    (
                        SELECT CourseEventKey
                        FROM @CourseEvents
                    )
            ) f2
            WHERE
                f2.CourseEventKey = f1.CourseEventKey
            FOR XML PATH('')
        )
    , 1, 2, '')
FROM
(
    SELECT DISTINCT
        ces.CourseEventKey,
        f.Title
    FROM
        CourseEventSchedule ces
    INNER JOIN Facility f 
        ON f.FacilityKey = ces.FacilityKey
    WHERE
        ces.CourseEventKey IN 
        (
            SELECT CourseEventKey
            FROM @CourseEvents
        )
) f1;

数据是准确的，但我不能，FOR XML PATH('')因为它会转义某些特殊字符。

需要明确的是，我使用的FOR XML PATH('')是因为相同的记录可能CourseEventKey有多个Facility与之关联的标题。

如何在不使用的情况下保留此查询返回的数据FOR XML PATH('')？

Answer 1

尝试更改您的语句以匹配此内容：

FOR XML PATH(''), TYPE).value('(./text())[1]','varchar(max)')

这使用该.value xml方法来解决您的实体化问题。