Thanks  Manish For Reply, 

I have an Employee Entity and in the same time I have a manager he is already an Employee and become a manager and I want to make this relationship { A manager manage Employee  }  

how I will do this?

Hi. In your Employee Entity you simple create another Attribute (eg. ManagerId) of type Employee Identifier. 

Here How to Find All Employees Under Each Manager in SQL | LearnSQL.com  is a page showing some simple SQL queries how to query Employee / Manager constellation which can be easily transformed to OutSystems as either Aggregates or Custom SQL.

Hope that helps,

Stefam

Hi Mohamed, 

Complementing what Stefan said, your entity would be, for example:

Managers will be considered with the field ManagerId null.

Regards.

@Agno Silveira Or an employee can be manager to other employees but also be managed by someone else :-)

Thanks So Much that what I thought to do

have a nice day sir

Yeh, I got it Thanks

 have a nice day sir