Sql server TSQL从XML中选择

我有一个如下所示的存储过程：

SELECT 
   ParamValues.x1.value('likeID[1]', 'VARCHAR(60)'),
   COUNT(B.[userID]) AS totalLikes
FROM   
   @likeXML.nodes('/likes/like') AS ParamValues(x1)
JOIN 
   apsLikes AS B ON B.[likeID] = ParamValues.x1.value('likeID[1]', 'VARCHAR(60)')
FOR XML PATH ('likeData'), TYPE, ELEMENTS, ROOT ('root');

但是，这将返回一个错误

列“ParamValues.x1”在选择列表中无效，因为它未包含在聚合函数或GROUP BY子句中

当我尝试将它添加到GROUPBY时，它说XML不能在GROUPBY子句中使用

---

设置格式的正确方法是什么？

其中一种方法是执行嵌套选择，如下所示：

SELECT LikeId, COUNT(Userid) FROM (
    SELECT ParamValues.x1.value('likeID[1]', 'VARCHAR(60)') LikeId,
           B.[userID] Userid
    FROM   @likeXML.nodes('/likes/like') AS ParamValues(x1)
    JOIN apsLikes AS B
    ON B.[likeID] = ParamValues.x1.value('likeID[1]', 'VARCHAR(60)')
    FOR      XML PATH ('likeData'), TYPE, ELEMENTS, ROOT ('root');
    ) tmp
Group By LikeId

; WITH XmlResults AS (
SELECT 
   ParamValues.x1.value('likeID[1]', 'VARCHAR(60)') AS likeId,
   B.[userID] AS totalLikes
FROM   
   @likeXML.nodes('/likes/like') AS ParamValues(x1)
JOIN 
   apsLikes AS B ON B.[likeID] = ParamValues.x1.value('likeID[1]', 'VARCHAR(60)')
FOR XML PATH ('likeData'), TYPE, ELEMENTS, ROOT ('root')
)
SELECT likeId, COUNT(totalLikes)
FROM XmlResults
GROUP BY likeId

---

你试过使用CTE吗？为第一列指定别名，并删除计数。。。像这样：

SELECT LikeId, COUNT(Userid) FROM (
    SELECT ParamValues.x1.value('likeID[1]', 'VARCHAR(60)') LikeId,
           B.[userID] Userid
    FROM   @likeXML.nodes('/likes/like') AS ParamValues(x1)
    JOIN apsLikes AS B
    ON B.[likeID] = ParamValues.x1.value('likeID[1]', 'VARCHAR(60)')
    FOR      XML PATH ('likeData'), TYPE, ELEMENTS, ROOT ('root');
    ) tmp
Group By LikeId

; WITH XmlResults AS (
SELECT 
   ParamValues.x1.value('likeID[1]', 'VARCHAR(60)') AS likeId,
   B.[userID] AS totalLikes
FROM   
   @likeXML.nodes('/likes/like') AS ParamValues(x1)
JOIN 
   apsLikes AS B ON B.[likeID] = ParamValues.x1.value('likeID[1]', 'VARCHAR(60)')
FOR XML PATH ('likeData'), TYPE, ELEMENTS, ROOT ('root')
)
SELECT likeId, COUNT(totalLikes)
FROM XmlResults
GROUP BY likeId

---

创建子查询，然后分组并使用XML“它应该可以工作：

select x1, count(Likes) from
(
SELECT 
   ParamValues.x1.value('likeID[1]', 'VARCHAR(60)') AS X1,
   B.[userID] AS Likes
FROM   
   @likeXML.nodes('/likes/like') AS ParamValues(x1)
JOIN 
   apsLikes AS B ON B.[likeID] = ParamValues.x1.value('likeID[1]', 'VARCHAR(60)')
) t
group by X1
FOR XML PATH ('likeData'), TYPE, ELEMENTS, ROOT ('root');

---

我试了一下，没想过这样做，但犯了这个错误？没有为“XmlResults”的第1列指定列名。很抱歉，没有架构，我很难在本地测试。。。如果您只是在With中运行select，那么每一列是否都有一个正确的名称？出于某种原因，我得到的错误必须声明标量变量@likeXML。当我运行它时，即使我的var已经声明了？您需要用SELECT语句声明您的@likeXML selected。同样，当我没有所有的模式、数据并且看不到您键入的内容时，我很难提供帮助：-如果您运行上面的原始查询，给第一列一个别名会给所有结果行和列名，对吗？我不知道为什么这对你不起作用。很抱歉