php - Mysqli 在多个字段中搜索值

Question

我想弄清楚如何搜索可能位于 Field1、Field2 或 Field3 中的 Value1。我知道我的语法是错误的，因为它显然不起作用，但这是我的破解方法:

$query = "SELECT *
   FROM table1
  WHERE city = '$city'
    AND state = '$state'
    AND location = '$location'
    AND (field1 = '$field1U' OR field1 = '$field2U' OR field1 = '$field3U')
  ORDER BY date_created LIMIT 5";
$data = mysqli_query($dbc, $query);

我想也许我可以使用 where field1 in (1,2,3) 但我无法让它工作。任何帮助将不胜感激。

Answer 1

如果你想找到所有的记录:

field1 = someValue

或field2 = someValue

或field3 = someValue

然后你可以使用这个:

  $query = "SELECT * FROM table1 WHERE city = '$city' AND state = '$state' AND    location = '$location' AND (field1 = '$Value1' OR field2 = '$Value1' OR field3 = '$Value1') ORDER BY date_created LIMIT 5";
    $data = mysqli_query($dbc, $query);