我想根据其他三个字段中的信息从单个字段中检索数据。 举个例子,如果我有一个包含以下字段的表: 宽度,长度,高度,重量和颜色。 我想得到字段颜色的值,其中width = $ value和length = $ value2和height = $ value。
答案 0 :(得分:0)
select color from table_name where width = $value and length = $value2 and height = $value3
我认为你的意思是使用SQL ....
答案 1 :(得分:0)
SQL几乎就是你在问题中所写的内容了!
select color from yourtable
where width = $value and length = $value2 and height = $value
PHP:
$result = $mysqli->query("SELECT color FROM yourtable WHERE width = $value AND length = $value2 AND height = $value");
答案 2 :(得分:0)
select 'singleFieldName' from table where width = $value AND length = $value2 AND height = $value3
答案 3 :(得分:0)
试试这个
echo $query = "select color from yourtable_name
where width = '".$value1."' and length = '".$value2."' and height = '".$value3."'";