MYSQL 和 Node.js 使用 where 子句插入多条记录

MYSQL and Node.js multiple record insert with where clause

我正在尝试使用 WHERE 子句从 Node.js 向 MYSQL 插入多条记录,但我一直收到语法错误。

在我尝试向它添加条件语句之前,该语句工作正常。然后我收到此错误: ER_PARSE_ERROR: 您的 SQL 语法靠近 VALUES 有错误?哪里...

var Data = data; // this is a nested array already as received from client side like [[..],[..],[..]]
var ID = 123; 

 var sql = "INSERT INTO table1 (Col1,Col2,Col3,Col4,Col5) VALUES ? WHERE"+ID+" NOT IN (SELECT somecol FROM table2 WHERE somecol= "+ID+")"

connection.query(sql, [Data], function (error, result) {
    if (error) {
        throw error;
        res.json({ Message: "Oops something went wrong :("});
    }

    res.json({ Message: "Your data was added!"});
});

连接已设置为允许多个语句:

var connection = mysql.createConnection({
    host: 'localhost',
    user: 'root',
    password: '1234',
    database: 'thedb',
    port: 12345,
    charset: "utf8mb4",
    multipleStatements: true
});

查询在没有 WHERE 子句的情况下以这种形式工作:

var Data = data; // this is a nested array already as received from client side like [[..],[..],[..]]
var ID = 123; 

var sql = "INSERT INTO table1 (Col1,Col2,Col3,Col4,Col5) VALUES ?"

connection.query(sql, [Data], function (error, result) {
    if (error) {
        throw error;
        res.json({ Message: "Oops something went wrong :("});
    }

    res.json({ Message: "Your data was added!"});
});

如何使用 WHERE 子句进行查询?

Insert 命令不适用于 Where 子句,因为您正在插入新行。简单来说,Where 子句需要根据条件过滤掉一些行。根据您的用例,您可以有两种可能的解决方案:

  1. 使用 Update 这样的语句 Update table set col1=val1 where (condition clause)

  2. 如果你真的想使用Where子句那么你可以使用下面形式的Insert命令

Insert into table(col1,col2) Select (val1, val2) from table2 where (condition clause);