Group related items in relation query

const proffesionals = await db
        .select()
        .from(proffesionalTable)
        .where(eq(proffesionalTable.userId, userId))
        .leftJoin(
            proffesionalServiceTable,
            eq(proffesionalServiceTable.proffesionalId, proffesionalTable.id)
        )
        .all();

[
  {
    Proffesional: {
      id: 1,
      userId: '17g2t59h',
      firstName: 'martin',
      lastName: 'Diaz',
      availability: [Object]
    },
    ProffesionalService: null
  },
  {
    Proffesional: {
      id: 2,
      userId: '17g2t59h',
      firstName: 'asd',
      lastName: 'asd',
      availability: [Object]
    },
    ProffesionalService: null
  },
  {
    Proffesional: {
      id: 3,
      userId: '17g2t59h',
      firstName: 'testestes',
      lastName: 'test',
      availability: [Object]
    },
    ProffesionalService: { proffesionalId: 3, serviceId: 4 }
  },
  {
    Proffesional: {
      id: 3,
      userId: '17g2t59h',
      firstName: 'testestes',
      lastName: 'test',
      availability: [Object]
    },
    ProffesionalService: { proffesionalId: 3, serviceId: 5 }
  }
]

[
  {
    Proffesional: {
      id: 1,
      userId: '17g2t59h',
      firstName: 'martin',
      lastName: 'Diaz',
      availability: [Object]
    },
    ProffesionalService: []
  },
  {
    Proffesional: {
      id: 2,
      userId: '17g2t59h',
      firstName: 'asd',
      lastName: 'asd',
      availability: [Object]
    },
    ProffesionalService: []
  },
  {
    Proffesional: {
      id: 3,
      userId: '17g2t59h',
      firstName: 'testestes',
      lastName: 'test',
      availability: [Object]
    },
    ProffesionalService: [4,5]
  }
]