Learning to delete rows in your table using Sequelize

To delete rows of data from your SQL table using Sequelize, you need to use the provided destroy() method.

The destroy() method can be called from any Model or instance of your Model to delete rows from your table.

For example, suppose you have a table of Cities with the following data:

| id | cityName   |
|  1 | York       |
|  2 | Bristol    |
|  3 | Manchester |
|  4 | London     |
|  5 | Glasgow    |

To delete any row from the table above, you need to first create a Model of that table as shown below:

const City = sequelize.define(
  { cityName: Sequelize.STRING },
  { timestamps: false }

After that, you can call the destroy() method from the City model.

The following code seeks to delete all rows where the cityName is Manchester:

await City.destroy({
  where: { cityName: "Manchester" },

The destroy() method requires the where option to be present on the method or it will throw an error on execution.

Sequelize will generate and execute the following SQL statement to your connected database:

WHERE `cityName` = 'Manchester'

The statement above will delete all rows that match the specified where condition.

Now the data on the Cities table will be as follows:

| id | cityName |
|  1 | York     |
|  2 | Bristol  |
|  4 | London   |
|  5 | Glasgow  |

The destroy() method can also be called from any Model instance, whether you get that instance from creating a new row or finding it from your table.

The example below shows how to delete a row from a found instance using the findOne() method:

const row = await City.findOne({
  where: { cityName: "Glasgow" },

if (row) {
  await row.destroy(); // deletes the row

And that’s how you can delete row(s) from the SQL table with Sequelize.

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