Question

下面的查詢工作並返回結果

$query = "SELECT * FROM table WHERE District = '" . $var . "' ORDER BY Form_Date DESC"; 

在那裏，如果我有一個變量替換單詞「區」，這是行不通的

$query = "SELECT * FROM table WHERE '" . $distvar . "' = '" . $var . "' ORDER BY Form_Date DESC"; 

這個有什麼問題，我怎樣才能使它工作？

Answer 1

刪除周圍您是測試場的報價，或與反引號替換它們給你從MySQL解析器保存誤認爲一個潛在的保留字：

$query = "SELECT * FROM `table` WHERE `" . $distvar . "` = '" . $var . "' ORDER BY Form_Date DESC"; 

Answer 2

試試這個：

$query = "SELECT * FROM table WHERE `" . $distvar . "` = '" . $var . "' ORDER BY Form_Date DESC"; 

或

$query = "SELECT * FROM table WHERE " . $distvar . " = '" . $var . "' ORDER BY Form_Date DESC";