Searching multiple tables at the same time in a database

Question

I am trying to search the database column called "equipment" for multiple table models using sequelize. However, I am not receiving any data even though the fields are full. I am attempting to use the "Promise".

However, if I simply call the model ( //boilerHouse.findAll({ where: { equipment_type: { [Op.in]: [req.params.name] } } }).then((data) => { ), I can search one table but not all.

router.get("/equipmentInfo/:name", (req, res) =>

 Promise.all([boilerHouse.findAll({ where: { equipment_area: { [Op.in]: [req.params.name] } } }), compressorHouse.findAll({ where: { equipment_area: { [Op.in]: [req.params.name] } } }), engineHouse33.findAll({ where: { equipment_area: { [Op.in]: [req.params.name] } } }), fireHouse.findAll({ where: { equipment_area: { [Op.in]: [req.params.name] } } }), hfoSeparator.findAll({ where: { equipment_area: { [Op.in]: [req.params.name] } } }), reverseOsmosis.findAll({ where: { equipment_area: { [Op.in]: [req.params.name] } } }), tankFarm33.findAll({ where: { equipment_area: { [Op.in]: [req.params.name] } } }) ])
.then((data) => {

  //boilerHouse.findAll({ where: { equipment_type: { [Op.in]: [req.params.name] } } }).then((data) => {

    res.render('gigs', {
      gigs:data,

     //data[0] is response from tableA find
     // data[1] is from tableB
      })   
    }).catch(err => console.log(err)));

Answer 1

I'm not a Javascript developer but if I had the same problem I will do the following:

1. I will make a function of what I need to search and where to search as parameters
2. create multiple processes for all the places where I need to search It called asynchronous programming
3. wait for responses of all processes then return the responses to the main process
4. Then do the rest of work

Is like process 4 requests once at the same time without waiting to others to finish