diff --git a/NodeMysql/server.js b/NodeMysql/server.js
index 06614d0..d7075fe 100644
--- a/NodeMysql/server.js
+++ b/NodeMysql/server.js
@@ -31,6 +31,7 @@ app.post('/insert', (req, res) => {
   
     // 构建SQL插入语句
     const placeholders = columns.map(() => '?'); // 原数组映射为新数组，新数组的每个元素均为问号，使用问号作为占位符
+    //需要用这种方式来赋值，不然字符串的双引号会丢失
     const sql = `INSERT INTO \`${table}\` (${columns.join(', ')}) VALUES (${placeholders.join(', ')})`;
   
     // 执行SQL插入语句
@@ -69,9 +70,10 @@ app.post('/modify', (req, res) => {
     const { table,id,columns, values } = req.body; // 从请求体获取数据
   
     // 构建SQL插入语句
-    const placeholder = columns.map((element,index) => element + '=' + values[index]).join(',');
+    const placeholder = columns.map(() => '?'); // 原数组映射为新数组，新数组的每个元素均为问号，使用问号作为占位符
+    const placeholders = columns.map((element,index) => element + '=' + placeholder[index]).join(',');
    //组合成 name1=value1,name2=value2,name3=value3......的形式
-    const sql = `UPDATE \`${table}\` ${placeholder} where id = ${id}`;
+    const sql = `UPDATE \`${table}\` SET ${placeholders} where id = ${id}`;
   
     // 执行SQL插入语句
     pool.query(sql, values, (error, results, fields) => {