如何通过变量将数据插入MySQL数据库？

Question

我试图在程序开始时插入javascript中定义的值。 但它不喜欢我尝试插入变量，而是应该输入原始名称。

这是错误代码：

错误：ER_BAD_FIELD_ERROR：“字段列表”中的未知列“用户名”

我正在使用SQL数据库和javascript与它进行交互。 该值已预先用变量定义。

var username = "Mark Graham"
var password = 13.00

con.connect(function(err) {
    var username = "Mark Graham"
    var password = 13.00 
    if (err) throw err;
    console.log("Connected!");
    var sql = "INSERT INTO staff (name, hours) VALUES (username, password)";
    con.query(sql, function (err, result) {
        if (err) throw err;
        console.log("1 record inserted");
    });
});

它应该将Mark Graham插入数据库。

Answer 1

实现ORM，Sequelize或使用

connection.query('INSERT INTO staff (name, hours) VALUES (?, ?)', [YourVar,YourSecondVar], function (error, results, fields) {
  // error will be an Error if one occurred during the query
  // results will contain the results of the query
  // fields will contain information about the returned results fields (if any)
});

要么

connection.query({
  sql: 'INSERT INTO staff (name, hours) VALUES (?, ?)',
  timeout: 40000, // 40s
  values: [varOne,varTwo]
}, function (error, results, fields) {
  // error will be an Error if one occurred during the query
  // results will contain the results of the query
  // fields will contain information about the returned results fields (if any)
});