如何使用node.js在mySQL中进行批量插入
如果使用以下内容，如何将大容量插入mySQL如何使用node.js在mySQL中进行批量插入,mysql,node.js,Mysql,Node.js,如果使用以下内容，如何将大容量插入mySQL 使用嵌套数组可以进行批量插入，请参阅 嵌套数组被转换为分组列表（用于批量插入），例如。 ['a'，'b'，['c'，'d']变成（'a'，'b'），（'c'，'d'） 您只需插入一个嵌套的元素数组 文中给出了一个例子 注意：values是包装在数组中的数组数组 还有一个完全不同的批量插入包Ragnar123的所有道具 在Josh Harington提出关于插入ID的问题后，我想对其进行扩展 这些将是连续的。看看这个答案： 因此，您可以这样做（注意我对
使用嵌套数组可以进行批量插入，请参阅 嵌套数组被转换为分组列表（用于批量插入），例如。
['a'，'b'，['c'，'d']（'a'，'b'），（'c'，'d'）values还有一个完全不同的批量插入包Ragnar123的所有道具 在Josh Harington提出关于插入ID的问题后，我想对其进行扩展 这些将是连续的。看看这个答案： 因此，您可以这样做（注意我对result.insertId所做的操作）：
var语句='插入到？？（“+sKeys.join（）+”）值；
var insertStatement=[tableName，values]；
var sql=db.connection.format（语句，insertStatement）；
db.connection.query（sql，函数（错误，结果）{
如果（错误）{
返回clb（错误）；
}
var rowIds=[]；
for（var i=result.insertId；i希望这有帮助。如果拉格纳的答案对你不合适。以下可能是原因（根据我的经验）-
Ragnarnode-mysqlmysql不起作用有关？mysql？var mysql = require('node-mysql');
var conn = mysql.createConnection({
...
});
var sql = "INSERT INTO Test (name, email, n) VALUES :params";
var values = [
['demian', 'demian@gmail.com', 1],
['john', 'john@gmail.com', 2],
['mark', 'mark@gmail.com', 3],
['pete', 'pete@gmail.com', 4]
];
conn.query(sql, { params: values}, function(err) {
if (err) throw err;
conn.end();
});
希望这对其他人有所帮助。如果需要，这里是我们如何解决数组插入问题的 请求来自邮递员（您将查看“来宾”） 我们是怎么写剧本的
var express = require('express');
var utils = require('./custom_utils.js');
module.exports = function(database){
var router = express.Router();
router.post('/', function(req, res, next) {
database.query('INSERT INTO activity (author_id, name, date, time, location) VALUES (?, ?, ?, ?, ?) ON DUPLICATE KEY UPDATE name = VALUES(name), date = VALUES(date), time = VALUES(time), location = VALUES(location)',
[req.body.author_id, req.body.name, req.body.date, req.body.time, req.body.location], function(err, results, fields){
if(err){
console.log(err);
res.json({ status: utils.respondMSG.DB_ERROR });
}
else {
var act_id = results.insertId;
database.query('INSERT INTO act_guest (user_id, activity_id, status) VALUES ? ON DUPLICATE KEY UPDATE status = VALUES(status)',
[Array.from(req.body.guests).map(function(g){ return [g, act_id, 0]; })], function(err, results, fields){
if(err){
console.log(err);
res.json({ status: utils.respondMSG.DB_ERROR });
}
else {
res.json({
status: utils.respondMSG.SUCCEED,
data: {
activity_id : act_id
}
});
}
});
}
});
});
return router;
};
@Ragnar123的答案是正确的，但我看到很多人在评论中说它不起作用。我遇到了同样的问题，您似乎需要像这样将数组包装在
[]var pars = [
[99, "1984-11-20", 1.1, 2.2, 200],
[98, "1984-11-20", 1.1, 2.2, 200],
[97, "1984-11-20", 1.1, 2.2, 200]
];
它需要像
[pars]function bulkInsert(connection, table, objectArray, callback) {
let keys = Object.keys(objectArray[0]);
let values = objectArray.map( obj => keys.map( key => obj[key]));
let sql = 'INSERT INTO ' + table + ' (' + keys.join(',') + ') VALUES ?';
connection.query(sql, [values], function (error, results, fields) {
if (error) callback(error);
callback(null, results);
});
}
bulkInsert(connection, 'my_table_of_objects', objectArray, (error, response) => {
if (error) res.send(error);
res.json(response);
});
希望有帮助 我也有类似的问题。它只是从数组列表中插入一个数组。在做了以下更改后，它工作正常
const items = [
{name: 'alpha', description: 'describes alpha', value: 1},
...
];
db.query(
'INSERT INTO my_table (name, description, value) VALUES ?',
[items.map(item => [item.name, item.description, item.value])],
(error, results) => {...}
);
我想提及的几件事是，我正在使用这个包与我的数据库建立连接，您在下面看到的是为insert bulk查询编写的工作代码
const values = [
[1, 'DEBUG', 'Something went wrong. I have to debug this.'],
[2, 'INFO', 'This just information to end user.'],
[3, 'WARNING', 'Warning are really helping users.'],
[4, 'SUCCESS', 'If everything works then your request is successful']
];
const query = "INSERT INTO logs(id, type, desc) VALUES ?";
const query = connection.query(query, [values], function(err, result) {
if (err) {
console.log('err', err)
}
console.log('result', result)
});
'use strict';
const mysql = require('promise-mysql');
const fs = require('fs');
const readline = require('readline');
async function run() {
const connection = await mysql.createConnection({
host: '1.2.3.4',
port: 3306,
user: 'my-user',
password: 'my-psw',
database: 'my-db',
});
const rl = readline.createInterface({ input: fs.createReadStream('myfile.txt') });
let total = 0;
let buff = [];
for await (const line of rl) {
buff.push([line]);
total++;
if (buff.length % 2000 === 0) {
await connection.query('INSERT INTO Phone (Number) VALUES ?', [buff]);
console.log(total);
buff = [];
}
}
if (buff.length > 0) {
await connection.query('INSERT INTO Phone (Number) VALUES ?', [buff]);
console.log(total);
}
console.log('end');
connection.close();
}
run().catch(console.log);
可以使用以下代码在Node.js中进行批量插入。为了得到这份工作，我参考了很多博客 也请参考此链接。 工作代码
const educations = request.body.educations;
let queryParams = [];
for (let i = 0; i < educations.length; i++) {
const education = educations[i];
const userId = education.user_id;
const from = education.from;
const to = education.to;
const instituteName = education.institute_name;
const city = education.city;
const country = education.country;
const certificateType = education.certificate_type;
const studyField = education.study_field;
const duration = education.duration;
let param = [
from,
to,
instituteName,
city,
country,
certificateType,
studyField,
duration,
userId,
];
queryParams.push(param);
}
let sql =
"insert into tbl_name (education_from, education_to, education_institute_name, education_city, education_country, education_certificate_type, education_study_field, education_duration, user_id) VALUES ?";
let sqlQuery = dbManager.query(sql, [queryParams], function (
err,
results,
fields
) {
let res;
if (err) {
console.log(err);
res = {
success: false,
message: "Insertion failed!",
};
} else {
res = {
success: true,
id: results.insertId,
message: "Successfully inserted",
};
}
response.send(res);
});
const educations=request.body.educations；
设queryParams=[]；
for（设i=0；i希望这对您有所帮助。如果您想插入对象，请使用以下命令：
currentLogs = [
{ socket_id: 'Server', message: 'Socketio online', data: 'Port 3333', logged: '2014-05-14 14:41:11' },
{ socket_id: 'Server', message: 'Waiting for Pi to connect...', data: 'Port: 8082', logged: '2014-05-14 14:41:11' }
];
console.warn(currentLogs.map(logs=>[ logs.socket_id , logs.message , logs.data , logs.logged ]));
[
[ 'Server', 'Socketio online', 'Port 3333', '2014-05-14 14:41:11' ],
[
'Server',
'Waiting for Pi to connect...',
'Port: 8082',
'2014-05-14 14:41:11'
]
]
另外，请查看以了解有关地图功能的更多信息。您的问题是什么？您可以使用与使用一个sql命令相同的方法来执行此操作吗？上一个命令完成后，只需启动下一个命令，直到插入所有数据。我的印象是，批量插入比许多单个插入快。在导线级别上，它们是相同的。mysql协议中没有“大容量插入”，mysql中有多个插入，只需使用VALUES关键字即可。使用VALUES语法的INSERT语句可以插入多行。为此，请包含多个列值列表，每个列值用括号括起来，并用逗号分隔。示例：在tbl_名称中插入（a、b、c）值（1,2,3）、（4,5,6）、（7,8,9）；这是否提供了与使用准备好的语句执行
conn.execute（）'use strict';
const mysql = require('promise-mysql');
const fs = require('fs');
const readline = require('readline');
async function run() {
const connection = await mysql.createConnection({
host: '1.2.3.4',
port: 3306,
user: 'my-user',
password: 'my-psw',
database: 'my-db',
});
const rl = readline.createInterface({ input: fs.createReadStream('myfile.txt') });
let total = 0;
let buff = [];
for await (const line of rl) {
buff.push([line]);
total++;
if (buff.length % 2000 === 0) {
await connection.query('INSERT INTO Phone (Number) VALUES ?', [buff]);
console.log(total);
buff = [];
}
}
if (buff.length > 0) {
await connection.query('INSERT INTO Phone (Number) VALUES ?', [buff]);
console.log(total);
}
console.log('end');
connection.close();
}
run().catch(console.log);
const educations = request.body.educations;
let queryParams = [];
for (let i = 0; i < educations.length; i++) {
const education = educations[i];
const userId = education.user_id;
const from = education.from;
const to = education.to;
const instituteName = education.institute_name;
const city = education.city;
const country = education.country;
const certificateType = education.certificate_type;
const studyField = education.study_field;
const duration = education.duration;
let param = [
from,
to,
instituteName,
city,
country,
certificateType,
studyField,
duration,
userId,
];
queryParams.push(param);
}
let sql =
"insert into tbl_name (education_from, education_to, education_institute_name, education_city, education_country, education_certificate_type, education_study_field, education_duration, user_id) VALUES ?";
let sqlQuery = dbManager.query(sql, [queryParams], function (
err,
results,
fields
) {
let res;
if (err) {
console.log(err);
res = {
success: false,
message: "Insertion failed!",
};
} else {
res = {
success: true,
id: results.insertId,
message: "Successfully inserted",
};
}
response.send(res);
});
currentLogs = [
{ socket_id: 'Server', message: 'Socketio online', data: 'Port 3333', logged: '2014-05-14 14:41:11' },
{ socket_id: 'Server', message: 'Waiting for Pi to connect...', data: 'Port: 8082', logged: '2014-05-14 14:41:11' }
];
console.warn(currentLogs.map(logs=>[ logs.socket_id , logs.message , logs.data , logs.logged ]));
[
[ 'Server', 'Socketio online', 'Port 3333', '2014-05-14 14:41:11' ],
[
'Server',
'Waiting for Pi to connect...',
'Port: 8082',
'2014-05-14 14:41:11'
]
]