组合标量查询和返回多列的子查询的结果

Question

有没有办法组合两个查询，一个是标量查询，另一个是多列子查询，以在一行中返回数据？

SELECT 
    DB_NAME() DB,
    (select SettingValue from Settings where SettingName = 'XYZ') 'Is XYZ',
    (SELECT Department.DeptName, COUNT(*) 
        FROM (SELECT DISTINCT substring(Source, len(Source) - 17, 14) AS DeptId FROM AuditLog) LogDept 
        inner join Department on LogDept.DeptId = Department.DeptId
        GROUP BY Department.DeptName) 

我想要这样的结果

D B	是 XYZ	部门名称	数数
测试	真的	鳍	20
测试	真的	人力资源部	12

Answer 1

从字面上看，只需将它们添加到您的子查询并使其成为您的主查询。

SELECT
    DB_NAME() DB
    , (SELECT SettingValue FROM Settings WHERE SettingName = 'XYZ') 'Is XYZ'
    , D.DeptName, COUNT(*) 
FROM (
    SELECT DISTINCT substring(Source, len(Source) - 17, 14) AS DeptId
    FROM AuditLog
) LogDept AS LD
INNER JOIN Department AS D ON D.DeptId = LD.DeptId
GROUP BY D.DeptName;

我建议使用我已经演示过的短表别名。