ORDER BY在WHERE之後的用法

Question

我想在WHERE子句之後使用ORDER BY來命令我的結果。

我想是這樣的：

$queryl = "select * from logs where pid=".$rowcd['id']. "order by bottom desc"; 

它給了我Fatal error: Call to a member function fetch_assoc()。

沒有ORDER BY我的查詢工作的罰款：

$queryl = "select * from logs where pid=".$rowcd['id']; 

Answer 1

$queryl = "select * from logs where pid=".$rowcd['id']. " order by bottom desc"; 

前ORDER BY條款雙引號和秩序

「爲了

Answer 2

放置一個空格後添加一個空格

。

$queryl = "select * from logs where pid = {$rowcd['id']} order by bottom desc"; 

Answer 3

我有時會遇到空間問題。我認爲訂單關鍵字之前必須有空格。

$queryl = "select * from logs where pid=".$rowcd['id']. " order by bottom desc";