Update multiple rows mysql nodejs

I am using node-mysql, node-js, and Q promises.

I have successfully updated, deleted, and inserted single rows using the above. As well as inserted multiple rows in a single statement in my test case scenario.

However, I need to update multiple rows with different values (batch mode) either in a single query or in a for loop.

The information on how to use prepared statements in mysql2 (supposed to improve on node-mysql) is very sparse and there are no examples, although that should be the natural choice, together with promises to compensate for node-js asynchronous nature.

In addition, I have successfully used defered.makeNodeResolver() in various test scenarios.

I am trying to update multiple rows in a single query with a where clause and changing conditions.

It is working when I update a single row. However, when I try to update multiple rows with a single query, the records aren't updated.

I am ready to switch to using a for loop to perform multiple updates and then aggregate the result and send it back from the server to the client, which would have been my second preferred choice. And I don't see why it shouldn't be done that way if there isn't too much of a performance hit. But I haven't found any examples for doing it that way.

var values = [
    { users: "tom", id: 101 },
    { users: "george", id: 102 }
    ];

    // var params = [values.users, values.id ];

    var sql = 'UPDATE tabletest SET users = ? WHERE id = ?;';


    connection.query(sql, [{users: values[0].users}, {id: values[0].id }], defered.makeNodeResolver());

The code shown above isn't actually updating multiple rows. I imagine there's an error in my syntax.

But anyway, what is the best approach to go about this in this particular scenario? Prepared statements, repeated queries in a for loop, or stored procedures?

Questions : Updating multiple rows with node-mysql, NodeJS and Q

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00

9493

I am using node-mysql, node-js, and Q anycodings_promise promises.

I have successfully updated, deleted, and anycodings_promise inserted single rows using the above. As anycodings_promise well as inserted multiple rows in a single anycodings_promise statement in my test case scenario.

However, I need to update multiple rows with anycodings_promise different values (batch mode) either in a anycodings_promise single query or in a for loop.

The information on how to use prepared anycodings_promise statements in mysql2 (supposed to improve on anycodings_promise node-mysql) is very sparse and there are no anycodings_promise examples, although that should be the anycodings_promise natural choice, together with promises to anycodings_promise compensate for node-js asynchronous nature.

In addition, I have successfully used anycodings_promise defered.makeNodeResolver() in various test anycodings_promise scenarios.

I am trying to update multiple rows in a anycodings_promise single query with a where clause and anycodings_promise changing conditions.

It is working when I update a single row. anycodings_promise However, when I try to update multiple rows anycodings_promise with a single query, the records aren't anycodings_promise updated.

I am ready to switch to using a for loop to anycodings_promise perform multiple updates and then aggregate anycodings_promise the result and send it back from the server anycodings_promise to the client, which would have been my anycodings_promise second preferred choice. And I don't see why anycodings_promise it shouldn't be done that way if there isn't anycodings_promise too much of a performance hit. But I haven't anycodings_promise found any examples for doing it that way. anycodings_promise

var values = [
    { users: "tom", id: 101 },
    { users: "george", id: 102 }
    ];

    // var params = [values.users, values.id ];

    var sql = 'UPDATE tabletest SET users = ? WHERE id = ?;';


    connection.query(sql, [{users: values[0].users}, {id: values[0].id }], defered.makeNodeResolver());

The code shown above isn't actually updating anycodings_promise multiple rows. I imagine there's an error in anycodings_promise my syntax.

But anyway, what is the best approach to go anycodings_promise about this in this particular scenario? anycodings_promise Prepared statements, repeated queries in a anycodings_promise for loop, or stored procedures?

Total Answers 7

31

Answers 1 : of Updating multiple rows with node-mysql, NodeJS and Q

You can do it this way:

var values = [
  { users: "tom", id: 101 },
  { users: "george", id: 102 }
];
var queries = '';

values.forEach(function (item) {
  queries += mysql.format("UPDATE tabletest SET users = ? WHERE id = ?; ", item);
});

connection.query(queries, defered.makeNodeResolver());

To use multiple statements feature you anycodings_node-mysql have to enable it for your connection:

var connection = mysql.createConnection({
  ...
  multipleStatements: true,
});

0

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00Answer Link

mRahman

1

Answers 2 : of Updating multiple rows with node-mysql, NodeJS and Q

You should probably do following way

UPDATE DB.table
SET table.row = newValue WHERE table.someColumn in ('columnVal1', 'columnVal2');

ex.

UPDATE DB.Students
SET result = "pass" WHERE rollNo in (21, 34, 50);

0

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00Answer Link

jidam

6

Answers 3 : of Updating multiple rows with node-mysql, NodeJS and Q

Don't know if this problem it's still anycodings_node-mysql relevant but I will give my 2 cents:

The solution that I found is to use anycodings_node-mysql Promise.all

Basically you need to build an array of anycodings_node-mysql promises, where every promise is an anycodings_node-mysql update statement:

const getUpdatePromise = (row) => {
  return new Promise( (resolve, reject) => {
    mysqlConnection.query('UPDATE tableName SET foo = ? WHERE bar = ?', [row[0], row[1], (error, results, fields) => {
      if (error) reject(error)
      resolve(results)
    });
  })
}

You add this new Promise into an array anycodings_node-mysql and pass the final array with all the anycodings_node-mysql update statements to the Promise.all anycodings_node-mysql function.

It worked for me. Hope it works for anycodings_node-mysql someone else.

0

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00Answer Link

raja

2

Answers 4 : of Updating multiple rows with node-mysql, NodeJS and Q

let query = "";
query += "UPDATE `DBNAME` SET `field1` = `Value`, `field2` = CASE";
`Field3Array`.forEach((item, index) => {
 query += " WHEN `field3` = '" + item + "' THEN '" + `Field2Array[index]` + "'";
});
query += " END";
query += " WHERE `field3` IN (" + "'" + `Field3Array`.join("','") + "'" + ")";

sql.query(query, function (err, rows) {
    if (err) {
        console.log(err)
    } else {
        console.log(rows)
    }
});

In here, field1 & field 2 is needed anycodings_node-mysql be updated and field3 is 'where' anycodings_node-mysql clause. The result is undoubtedly anycodings_node-mysql success. I hope this answer will be of anycodings_node-mysql great help in updating multiple fields anycodings_node-mysql in multiple rows at once using mysql anycodings_node-mysql query.

0

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00Answer Link

jidam

5

Answers 5 : of Updating multiple rows with node-mysql, NodeJS and Q

I don't think you can (at least anycodings_node-mysql easily/efficiently) update multiple rows anycodings_node-mysql in the way you are trying. You would anycodings_node-mysql basically have to loop over your values anycodings_node-mysql and execute an UPDATE for each object.

0

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00Answer Link

raja

1

Answers 6 : of Updating multiple rows with node-mysql, NodeJS and Q

this piece of code was taken from vcl.js anycodings_node-mysql for node.js, it is written in typescript anycodings_node-mysql and provides a multiple anycodings_node-mysql update,delete,inseer statment's in a anycodings_node-mysql single transaction.

export class SQLStatment {
    sql: string;
    params: Object
}

var dbError: string;
var execCount: number = 0;
function DBexecuteBatchMYSQLSingle(connection: any, SQLStatmentArray: Array<SQLStatment>, index: number, callback: () => void) {
    execCount++;
    connection.query(SQLStatmentArray[index].sql, SQLStatmentArray[index].params, function (err, rows, fields) {
        if (err) dbError = err;
        if (index + 1 == SQLStatmentArray.length) callback();
        else {
            if (!dbError) {
                DBexecuteBatchMYSQLSingle(connection, SQLStatmentArray, index + 1, function () {
                    if (index == 0) callback();
                });
            }
        }
    });
}

function DBBatchUpdateMYSQL(SQLStatmentArray: Array<SQLStatment>, callback?: (err) => void) {
    var mysql = require('mysql');
    var connection = mysql.createConnection({
        host: "host",user: "user",database: "db",
        port: 1022, password: "pass"});
    dbError = null;
    execCount = 0;
    connection.beginTransaction(function (err) {
        if (err && callback) callback("Database error:" + err);
        else {
            DBexecuteBatchMYSQLSingle(connection, SQLStatmentArray, 0, () => {
                if (dbError) {
                    connection.rollback(function () {
                        if (callback) callback("Database error:" + dbError);
                    });
                } else {
                    connection.commit(function (err) {
                        if (callback) callback(null);
                    })
                }
            });
        }
    });
}

0

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00Answer Link

miraj

4

Answers 7 : of Updating multiple rows with node-mysql, NodeJS and Q

A simpler solution using anycodings_node-mysql multipleStatements: true:

 function multiupsert(table, cadena) {
return new Promise((resolve, reject) => {   


    var queries = '';
    cadena.forEach(function (item) {
         console.log(item)
        queries += `UPDATE ${table} SET descripcion = '${item.descripcion}',costo = '${item.costo}',estado = '${item.estado}' WHERE id = ${item.id} ; `
      });
      
      let conesM=getConectionMulti();
      conesM.connect();
      conesM.query(queries, (err1, result, fields) => {
        if (err1) return reject(err1)
            resolve(result.insertId);  
            console.log(result);
            conesM.end();   
        });

})

}

0

2022-09-30T10:39:11+00:00 2022-09-30T10:39:11+00:00Answer Link

jidam

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