Regarding Joins

[saikiran_nemani]

SF_EMPLOYEE__C	SF_DIARY_ENTRY__C
employee_number__c	hours__c
own_labour__c	job_hours__c
	own_labour__c

On which condition we have to join to the Master dataset ?

and the condition should be like 0 as contract and 1 as non-Contract for own_labour__c

[LinusH]

Too little information provided.
Exactly what is you want to know/don't understand?
Know your data, othwrwise you can't perform data operations.