Question

我在数据库中有两个表：

帖子表

id|name|message|time

通知表

id|name|initiator|type|message|time

我想要的是两个输出两个表不是一个接一个地混合。

类似的东西：

Simon: Reebal want to be friends? 5 minutes ago
Reebal: Yeah sure. 4 minutes ago
Simon and Reebal are friends now (notification)
Reebal: How are you? 2 minutes ago
Simon: Fine and you? 1 minute ago

而不是这样：

Simon and Reebal are friends now (notification)
Simon: Reebal want to be friends? 5 minutes ago
Reebal: Yeah sure. 4 minutes ago
Reebal: How are you? 2 minutes ago
Simon: Fine and you? 1 minute ago

有可能这样做吗？我希望你明白我的意思？请不要完整的代码，只是正确的建议。

Answer 1

建议：

您应该在两个查询中使用union来获得结果。

UNION关键字

Answer 2

你可以使用UNION。

select * from (
    SELECT name, '' as initiator, '' as type, message, time from post
    UNION
    SELECT name, initiator, type, message, time from notification
) as data order by time desc

这应该对你有用

一个查询中有两种不同的帖子类型

2 个答案: