如何一个用户只获取一条消息

Question

PHP从MySQL数据库中读取单个记录的最佳方法是什么？

SELECT * FROM messages WHERE receiver ='$id' ORDER BY datetime DESC

它显示所有消息，我只希望一个用户发布一个帖子。

Answer 1

使用LIMIT

"SELECT * FROM messages WHERE receiver ='$id' ORDER BY datetime DESC LIMIT 1" 

Answer 2

Limit会这样做。您可以使用

"SELECT * FROM messages WHERE receiver ='$id' ORDER BY datetime DESC LIMIT 1" 

或者你可以喜欢

"SELECT * FROM messages WHERE receiver ='$id' ORDER BY datetime DESC LIMIT 0,1" 

Answer 3

在查询中使用LIMIT：

"SELECT * FROM messages WHERE receiver ='$id' ORDER BY datetime DESC LIMIT 1"