SQL条件取决于同一查询中的结果

Question

我有这个mySQL声明：

SELECT (SELECT COUNT(id) from online_users WHERE name='lol') as online, id, name, city
FROM players 
WHERE name='lol'
AND last_action < date_sub(now(), interval 1 hour)

然而我希望last_action间隔变化;如果online为1则为1分钟，如果online为0则为1小时

这可以在一个查询中完成吗？怎么样？

Answer 1

SELECT (SELECT COUNT(id) from online_users WHERE name='lol') as online, id, name, city
FROM players 
WHERE name='lol'
AND last_action < date_sub(now(), interval 1 CASE WHEN online=0 THEN hour ELSE MINUTE END)

尝试以上代码。

希望这会有所帮助。

Answer 2

您可以使用OR条件，如下所示：

SELECT (SELECT COUNT(id) from online_users WHERE name='lol') as online, id, name, city
FROM players 
WHERE name='lol'
AND ((last_action < date_sub(now(), interval 1 hour) AND online = 1) OR (last_action < date_sub(now(), interval 1 minute) AND online = 0))