id || data || column
 1 ||  10  ||  x
 1 ||  20  ||  y
 1 ||  30  ||  y
 1 ||  15  ||  z



var queryPartOne = await db.table.findOne({
        attributes: [
          [db.Sequelize.fn("sum", db.Sequelize.col("data")), "datas"]
        ]
      )}

var queryPartTwo = await db.table.findOne({
        where: {
          column: z
        },
        attributes: [
          [db.Sequelize.fn("sum", db.Sequelize.col("data")), "datas"]
        ]
      )}

var net = queryPartOne.datas- queryPartTwo.datas * 1,25;