Mybatis 时间排序让空值NULL排在后面

有一张通知(notification)表；

需求：

1.状态(status)为发布“on”要排在未发布“off”前面；

2.先按发布时间排序再按创建时间排序，发布时间为空的要排在后面。

select * from notification;

id	content	status	create_time	publiish_time
1	aaa	on	2018-10-17 12:45:00	2018-10-17 12:45:00
2	bbb	off	2018-10-17 12:45:00
3	ccc	on	2018-10-17 12:45:00	2018-10-17 12:45:00
4	ddd	on	2018-10-17 12:45:00	2018-10-17 12:45:00
5	eee	off	2018-10-17 12:45:00

 

 

 

 

 

 

 

        SELECT
        
        FROM notification
        WHERE
        1 = 1
        
            AND content = #{content}
        
        
            AND status = #{status}
        
        
            AND  = #{startPublishDate}]]>
        
        
            AND 
        
        ORDER BY
        status = "off", status = "on", create_time DESC, publish_time is NULL, publish_time DESC
    

原文链接：https://blog.csdn.net/liu59412/article/details/83141566