按时间戳排序记录，但首先列出指定的ID

Question

的MySQL

+----+------------+
| id | timestamp  |
+----+------------+
| 1  | 1306922400 |
+----+------------+
| 2  | 1306926000 |
+----+------------+
| 3  | 1306929600 |
+----+------------+

PHP

$a = mysql_query("SELECT * FROM `table` ORDER BY ?? DESC, `timestamp` DESC");

按顺序排序：

1. 从id等于2

开始

2. 然后按timestamp

排序

订单应该是：2,3,1

Answer 1

你可以使用UNION ......但我会避免它。

$a = mysql_query("
                  (SELECT * FROM `table` WHERE id = 2 ) UNION 
                  (SELECT * FROM table ORDER BY timestamp DESC)
                ");

考虑到我在第二个查询中没有UNION ALL，id = 2的记录将不会重复。

Answer 2

SELECT * FROM `table` where id = 2
union 
SELECT * FROM `table` where id != 2 order by id, timestamp desc

Answer 3

SELECT * FROM `table` ORDER BY `id`!=2 ASC,  `timestamp` DESC
// or
SELECT * FROM `table` ORDER BY `id`=2 DESC,  `timestamp` DESC

Answer 4

$a = mysql_query("SELECT * FROM `table` WHERE id = 2 ORDER BY `timestamp` DESC UNION SELECT * FROM `table` WHERE id != 2 ORDER BY `timestamp DESC");