組合標量查詢和返回多列的子查詢的結果

Question

有沒有辦法組合兩個查詢，一個是標量查詢，另一個是多列子查詢，以在一行中返回數據？

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) 

我想要這樣的結果

D B	是 XYZ	部門名稱	數數
測試	真的	鰭	20
測試	真的	人力資源部	12

Answer 1

從字面上看，只需將它們添加到您的子查詢並使其成為您的主查詢。

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;

我建議使用我已經演示過的短表別名。