Question

我正在对我们的数据库进行更新，并希望更新另一个表中没有现有项目的行。我可以一起加入这些表，但是在分组表以获取行数

时遇到了麻烦

UPDATE dpt
SET dpt.active = 0 
FROM DEPARTMENT dpt
LEFT JOIN DOCUMENTS doc on dpt.ID = doc.DepartmentID
GROUP BY dpt.ID
HAVING COUNT(doc.ID) = 0

我该怎么办？

Answer 1

使用：

UPDATE DEPARTMENT
   SET active = 0 
 WHERE NOT EXISTS(SELECT NULL 
                    FROM DOCUMENTS doc
                   WHERE doc.departmentid = id)

Answer 2

UPDATE  department
SET     active = 0
WHERE   id NOT IN
        (
        SELECT  departmentId
        FROM    doc
        )

具有左连接和分组的SQL Server Update

2 个答案: