Question

我在下面尝试过使用XML Path但收到错误。

将varchar值'，'转换为数据类型int。
时转换失败

您能否更正以下问题。

SELECT STUFF((SELECT ',' + COUNT(E.EMployeeId) FROM EMployee E WHERE E.DepartmentId IN(SELECT DepartmentId FROM Department) 
            FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'),1,1,'')

必需的输出

5,7,8,9

Answer 1

尝试以下方法：

COUNT()返回integer值，您无法将int与varchar合并。因此，您必须convert将值char。

SELECT STUFF((SELECT ',' + CAST(COUNT(E.EMployeeId) AS VARCHAR) FROM EMployee E WHERE E.DepartmentId IN(SELECT DepartmentId FROM Department) 
            FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'),1,1,'')

试试这个答案，如果您遇到任何问题，请在评论中提及：

SELECT DISTINCT DepartmentId,
     STUFF(
        (
            SELECT ',' + CAST(COUNT(E.EMployeeId) AS VARCHAR) 
            FROM EMployee E 
            WHERE E.DepartmentId IN(SELECT DepartmentId FROM Department) 
                AND E.DepartmentId=T.DepartmentId
            FOR XML PATH(''), TYPE
            ), 1, 1, '') AS id_list
FROM EMployee as T

尝试使用此部分，以逗号分隔的部门和COUNT()：

SELECT STUFF((SELECT ',' + CAST((DepartmentId)AS VARCHAR) 
FROM(
    SELECT DepartmentId,COUNT(EMployeeId) EMployeeId
    FROM EMployee E 
    WHERE E.DepartmentId IN(SELECT DepartmentId FROM Department) 
    GROUP BY DepartmentId
    )E
FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'),1,1,'') DepID
    ,STUFF((SELECT ',' + CAST((EMployeeId)AS VARCHAR)
FROM(
    SELECT DepartmentId,COUNT(EMployeeId) EMployeeId
    FROM EMployee E 
    WHERE E.DepartmentId IN(SELECT DepartmentId FROM Department) 
    GROUP BY DepartmentId
    )E
FOR XML PATH(''), TYPE).value('.', 'VARCHAR(MAX)'),1,1,'')EmpCount

如何获取逗号分隔的每个部门的员工列表

1 个答案: