在WHERE之后使用ORDER BY

Question

我想在WHERE子句之后使用ORDER BY来命令我的结果。

我试过这样的事情：

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

它给了我Fatal error: Call to a member function fetch_assoc()。

没有ORDER BY我的查询工作正常：

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

Answer 1

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

在双引号和订单后添加空格

“订单

Answer 2

在ORDER BY子句之前放置一个空格。

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

Answer 3

我有时会遇到空格问题。我认为在order关键字之前必须有空格。

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