php - 尝试修复此 INSERT UPDATE on DUPLICATE 查询

Question

尝试使语法正确的 PHP 和 SQL 新手

<?php
include("php/functions.php");
$userId = $_SESSION['userID'];
include("connections/conn.php");
?>

session 带来的UserID

这是我要更正的查询

$insertquery1 = "INSERT INTO 
selfesteemscore(selestscore, UserID) VALUES('$newsselfesteemscore', '$userID' ON DUPLICATE KEY UPDATE selfesteemscore SET selestscore = '$newsselfesteemscore' , UserID = '$userID' ";

Answer 1

关于重复键更新查询has slightly different syntax :

INSERT INTO  selfesteemscore (
      selestscore
    , UserID
) VALUES(
      'NEW VALUE'
    , 'NEW USER ID VALUE'
)
ON DUPLICATE KEY UPDATE 
      selestscore = 'NEW VALUE'
    , UserID = 'NEW USER ID VALUE'
;

或者更好的是，不要重复新值两次:

INSERT INTO  selfesteemscore (
      selestscore
    , UserID
) VALUES(
      'NEW VALUE'
    , 'NEW USER ID VALUE'
)
ON DUPLICATE KEY UPDATE 
      selestscore = VALUES(selestscore)
    , UserID = VALUES(UserID)
;

警告:阅读有关 SQL 注入(inject)和转义值的信息或使用伪造的语句。

附言您初始化变量 $userId，但稍后使用变量 $userID