2
我在SQL這種類型的數據庫表的有關SQL行篩選
id | state | msg | userid | time |
1 |unread | hi | 1 | time |
2 |unread |hello| 1 | time |
3 |unread | hi | 2 | time |
4 | read | hi | 2 | time |
我有傳導打印行
Where state=unread
現在輸出
= userid 1 send you 'hi'
= userid 1 send you 'hello'
= userid 2 send you 'hi'
但我想以這種方式輸出
= userid 1 send you 'hello'
= userid 2 send you 'hi'
刪除同一用戶ID行只能選擇(使用SQLI PHP)
我可以使用SELECT * – 2014-12-04 06:12:35