php開發中sql語句拼接示例

 

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1.插入語句

$sql="insert into Ad(AdClassID,AdType) values('".$AdClassID."','".$AdType."')";
 

 2.從數據庫中選出數據

$sql = "select * from AdClass order by ID desc";
$sql = "select * from admin where AdminID='".$_SESSION['AdminID']."'";
 

3.更新數據庫中記錄數據

$sql="update Ad set AdClassID='".$AdClassID."' where ID='".$ID."'";

//查詢
$sql = "select * from comment where comment_id = ".$comment_fid;

或：        

$sql = "select * from comment where comment_id = '".$comment_fid."'";

//需要注意 這些引號問題
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