Question

我有两个表名课程和机构。这是我的疑问：

CREATE TEMPORARY TABLE 
IF NOT EXISTS temp  AS (SELECT course_name, ins_name
         FROM courses 
         where course_name='ACCA') ;

select institution.ins_name, address, contact, website, 
email from institution join temp on institution.ins_name = temp.ins_name

这是我的php脚本：

<?php
session_start();
include('db_connect.php');
$sql="CREATE TEMPORARY TABLE 
IF NOT EXISTS temp  AS (SELECT course_name, ins_name
         FROM courses 
         where course_name='ACCA') ;

 select institution.ins_name, address, contact, website, email from institution join temp on institution.ins_name = temp.ins_name";

$result= mysqli_query($conn, $sql) or die("MySQL error: " . mysqli_error($conn)); 

while ($row = mysqli_fetch_array($result)){

echo "<tr>";
echo "<td>" . $row['ins_name'] . "</td>";
echo "<td>" . $row['address'] . "</td>";
echo "<td>" . $row['contact'] . "</td>";
echo "<td>" . $row['website'] . "</td>";
echo "<td>" . $row['email'] . "</td>";

echo "</tr>";
}
echo "</table>"

?>

我无法弄清问题是什么。我得到的错误是：

MySQL错误：您的SQL语法出错;查看与您的MySQL服务器版本对应的手册，以便在'select institution.ins_name，地址，联系方式，网站，来自机构j'的第6行的电子邮件附近使用正确的语法

我做错了什么？

Answer 1

来自Multiple Statements：

MySQL可选择允许在一个语句中包含多个语句   串。一次发送多个语句会减少客户端 - 服务器   往返但需要特殊处理。

必须执行多个语句或多个查询   mysqli_multi_query()。声明的个别陈述   字符串用分号分隔。然后，返回所有结果集   必须提取已执行的语句。

或者，只需触发两个查询。

Answer 2

每个查询都必须单独执行。 Input.GetKey()和keycodes是两个不同的查询，因此首先您需要为using UnityEngine; using System.Collections; public class PlayerController : MonoBehaviour { public float speed = 80.0f; // Code for how fast the ball can move. Also it will be public so we can change it inside of Unity itself. public Rigidbody player1RB; //Player 1 Rigidbody public Rigidbody player2RB; //Player 2 Rigidbody //Player 1 Code with aswd keys void Player1Movement() { if (Input.GetKey(KeyCode.A)) { player1RB.AddForce(Vector3.left * speed); } if (Input.GetKey(KeyCode.D)) { player1RB.AddForce(Vector3.right * speed); } if (Input.GetKey(KeyCode.W)) { player1RB.AddForce(Vector3.forward * speed); } if (Input.GetKey(KeyCode.S)) { player1RB.AddForce(Vector3.back * speed); } } //Player 2 Code with arrow keys void Player2Movement() { if (Input.GetKey(KeyCode.LeftArrow)) { player2RB.AddForce(Vector3.left * speed); } if (Input.GetKey(KeyCode.RightArrow)) { player2RB.AddForce(Vector3.right * speed); } if (Input.GetKey(KeyCode.UpArrow)) { player2RB.AddForce(Vector3.forward * speed); } if (Input.GetKey(KeyCode.DownArrow)) { player2RB.AddForce(Vector3.back * speed); } } // Update is called once per frame void FixedUpdate() { Player1Movement(); Player2Movement(); } }调用create，然后为select调用mysqli_query

Answer 3

每列都需要别名：

 select institution.ins_name, institution.address, institution.contact, institution.website, institution.email from institution join temp on institution.ins_name = temp.ins_name";

sql适用于phpmyadmin但不适用于php脚本

3 个答案: