database design - Modeling Employee-Manager relationship -


each employee in company has unique employee id

a particular number of employees form team, eg employees 1 - 5 form team a

team a, , every other team, has 1 manager. manager employee, own employee id.

what best way of going model relationship?

here couple of suggestions.

groundwork:

assuming employees may member of more 1 team, you'll want separate employees table, separate team table, , table of links between two.

team

  • id (pk)
  • name

employee

  • id (pk)
  • name

teamemployees

  • id (pk)
  • teamid(fk->team.id)
  • employeeid (fk->employee.id)

leader:

now groundwork in place, here choices begin - have leader structure:

team table - leaderemployeeid (fk->employee.id)

  • advantage - 1 leader per team, simple
  • possible disadvantage (depending on requirements) - leader doesn't have employee exists in teamemployees table, additional checks may required

teamemployees table - isleader (bit)

  • possible advantage (depending on requirements) - leader has member of team
  • possible disadvantage (depending on requirements) - design allows more 1 leader per team, additional constraints needed fix this

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