Sequelize Order By

Sequelize is a popular Object-Relational Mapping (ORM) library for Node.js. It makes dealing with databases easier by providing a high-level API to interact with the database.

One of the most commonly used functionalities in Sequelize is sorting database records. The ORDER BY SQL statement allows us to sort records based on one or more columns. Sequelize provides a sort option to sort records in ascending or descending order.

Here's how to use the sort option:

const models = require('./models');

models.User.findAll({
  order: [
    ['name', 'ASC']
  ]
})
.then(users => console.log(users));

In the example above, we're sorting users by their name column in ascending order.

Sorting by multiple columns

To sort by multiple columns, we can add multiple elements to the order array. Each element represents a column to sort by. We can also specify the sort order for each column by adding a second argument to each element.

models.User.findAll({
  order: [
    ['name', 'ASC'],
    ['age', 'DESC']
  ]
})
.then(users => console.log(users));

In the example above, we're sorting users by their name column in ascending order and their age column in descending order.

Conclusion

Sorting is an essential part of working with databases. Sequelize's sort option makes it easy to sort database records in ascending or descending order. By using order array, we can also sort by multiple columns and specify the sort order for each column.

Remember that using ORDER BY can cause a performance hit if we're dealing with large databases. We should always consider indexing columns that we frequently sort by for better performance.