How do I perform complex queries using Sequelize in Node.js?

How do I perform complex queries using Sequelize in Node.js?

You can use Sequelize's query methods like findAll, findOne, and query to perform complex queries. What specific query are you trying to achieve?

I want to join two tables and filter the results based on a condition.

You can use the include option in your findAll method to join tables. For example:

const results = await ModelA.findAll({
  include: [{
    model: ModelB,
    where: { condition: value }
  }]
});

This will join ModelA with ModelB and filter based on the specified condition.

What if I need to sort the results as well?

You can add an order option to your query. For example:

const results = await ModelA.findAll({
  include: [{ model: ModelB }],
  where: { condition: value },
  order: [['columnName', 'ASC']]
});

This will sort the results by columnName in ascending order.

Can I also limit the number of results returned?

Yes, you can use the limit option to restrict the number of results. For example:

const results = await ModelA.findAll({
  limit: 10,
  include: [{ model: ModelB }],
  where: { condition: value }
});

This will return only the first 10 results.