1. create

                Model.create(vals_list)

eg:

                customer = self.env['res.partner'].create({    'name': 'Lead1 Email Customer'})
                

2. update

              self.write({'state': 'open'})
              

3. Search/Read

                Model.browse([ids])
              

eg:

               employee.employee_id = self.env['hr.employee'].browse(employee.id)
              

              Model.search(args[, offset=0][, limit=None][, order=None][, count=False])
              

              //syntax
              Model.search_count(args)

              //eg:
              user_connected =   self.env['res.users'].search_count([('company_id', '=', company.id), ('login_date', '>=', start), ('login_date', '<', end)])
              

4. delete

              Model.unlink()
              

eg:

              self.env['mail.channel'].browse(self.group_private.id).unlink()