mysql查询除某列之外数据

//取所有列名
$columnnamesql="select COLUMN_NAME from information_schema.COLUMNS where table_name = 表名";

...

$strcolumn='';
foreach($columnname as &$v){
        $strcolumn.=$v['COLUMN_NAME'].',';
}
unset($v);
//列名后有逗号
$strcolumn=str_replace("不要的列名,","",$strcolumn);

$strcolumn=substr($strcolumn,0,-1);

$sql="select $strcolumn from 表名";