這個 SQL 語句有什么問題 - 語法錯誤 #1064？

Question

SELECT id, content, UNIX_TIMESTAMP(timestamp) AS unixtime 
FROM data
ORDER BY id ASC 
WHERE unixtime <= CURDATE() LIMIT 10;

要么

SELECT id, content, UNIX_TIMESTAMP(timestamp) AS unixtime 
FROM data
ORDER BY id ASC 
WHERE unixtime < CURDATE() LIMIT 10;

所有 phpAdmin 告訴我的是：

#1064 - 你的 SQL 語法有錯誤； 檢查與您的 MySQL 服務器版本相對應的手冊，了解在第 1 行的“WHERE unixtime <= CURDATE() LIMIT 10”附近使用的正確語法

Answer 1

您將ORDER BY和WHERE子句顛倒了。

SELECT id, content, UNIX_TIMESTAMP(timestamp) AS unixtime 
FROM data
WHERE unixtime < CURDATE()
ORDER BY id ASC LIMIT 10;

要么

SELECT id, content, UNIX_TIMESTAMP(timestamp) AS unixtime 
FROM data
WHERE unixtime <= CURDATE() 
ORDER BY id ASC LIMIT 10;

我剛剛意識到您的問題的一部分，因為您在WHERE子句中引用了別名。：

WHERE UNIX_TIMESTAMP(timestamp) <= CURDATE() 

要么

WHERE UNIX_TIMESTAMP(timestamp) < CURDATE() 

Answer 2

請嘗試以下操作：

SELECT id, content, UNIX_TIMESTAMP(timestamp) AS unixtime 
FROM data 
WHERE UNIX_TIMESTAMP(timestamp) <= CURDATE() 
ORDER BY id ASC LIMIT 10;

Answer 3

試試這個

SELECT id, content, UNIX_TIMESTAMP(timestamp) AS unixtime 
FROM data
WHERE (UNIX_TIMESTAMP(timestamp)) < CURDATE() ORDER BY id ASC  LIMIT 10;

Answer 4

您需要在 order by 語句之前的 where 語句。