Multi Update SQL Method
The multiUpdate method allows you to update multiple rows in a SQL database table based on specified conditions. You can use this method to modify existing records efficiently.
Syntax
db.multiUpdate(dataname, tableName, queries, newData)
.then((result) => {
if (result.acknowledged) {
console.log(result.message); // Log success message
} else {
console.error(result.errorMessage); // Log error message
}
})
.catch((error) => {
console.error('An error occurred:', error); // Catch any unexpected errors
});Parameters
dataname: The name of your SQL database.tableName: The name of the table you want to update.queries: An array of conditions to match for updating rows. Each query object specifies the fields and values to match.newData: An object containing the updates to apply to the matching rows. Use the$setoperator to specify the new values.
Example
Suppose we have a SQL database with a table named employees. We want to update the age, department, and salary fields for employees with id 1 and 2. Here's how you would use the multiUpdate method:
const dataname = 'your_database.db'; // Specify the name of your database
const tableName = 'employees'; // Specify the name of the table
const queries = [
{ id: 1 },
{ id: 2 }
];
const newData = {
$set: {
age: 31, // Set the age to 31
department: 'Engineering', // Change the department to Engineering
salary: 6000.00 // Change the salary to 6000.00
}
};
db.multiUpdate(dataname, tableName, queries, newData)
.then((result) => {
if (result.acknowledged) {
console.log(result.message); // Log success message
} else {
console.error(result.errorMessage); // Log error message
}
})
.catch((error) => {
console.error('An error occurred:', error); // Catch any unexpected errors
});Expected Results
After executing the above code, the following rows will be updated:
Updated rows: [
{
"id": 1,
"name": 'John',
"age": 30
},
{
"id": 2,
"name": 'Alice',
"age": 25
}
]Feel free to adapt this example to your specific use case! 😊