数组中的位置 SQL

Question

更新：if sched_id = 2 {输出 user1,user2,user4,user5 }

你能帮我解决这些问题吗..Bcoz 现在当我运行代码时，只能使用 WHERE IN .. 找到第一个数字，或者是否有另一种方法来获取/搜索数组中的值 sql 用于 WHERE.. 谢谢！

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     <?php

 $dbServername = "localhost"; //servername
 $dbUsername = "root"; //database username
 $dbPassword = ""; //database password
  $dbName = "test_db"; //database name

 //Create connection
 $conn = mysqli_connect($dbServername, $dbUsername, $dbPassword, $dbName);

  if(isset($_POST["sched_id"]))  
  { 

 $sched_id = $_POST["sched_id"];

?>
  <!-- Col-12 -->
        <div class="col-md-12">

          <?php

           $sql = "SELECT user.Schedule_ID, user.FullName FROM user

            WHERE $sched_id IN (Schedule_ID) AND user.UserType = 0";
           $results = mysqli_query($conn, $sql);
           $row = mysqli_fetch_assoc($results);

            ?>
           <div class="row">
           <?php
           foreach ($results as $i => $result) :
             $rows = ceil(count($result) / 3); 
           ?>
             <?php if($i % $rows === 0 && $i !== 0): ?>
             </div><div class="row">
           <?php endif;?>

           <div class="col-sm-4">
            <?php echo $result['FullName']; ?>
           </div>
           <?php endforeach;?>

        </div>

      </div>

   <?php } ?>

其中 Schedule_ID 由数组值组成。

Answer 1

试试 FIND_IN_SET(str,strlist):

SELECT user.Schedule_ID, user.FullName 
FROM user 
WHERE 
FIND_IN_SET($sched_id, user.Schedule_ID) > 0
AND user.UserType = 0

数组中的位置 SQL

WHERE IN Array SQL

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where-in