Neo4j Constraints

            
 

            

        

          

          
          

          

              

                  
              

          










unique constraint 


 
  Constraint - all employees have unique employee ids

  create constraint on(e:employee) assert e.empid is unique







 








Dropping an unique constraint


 
  drop constraint on (e:employee) assert e.empid is unique





 







Property Existence constraint


 
  create constraint on (e:employee) assert exists(e.empid)





 







Dropping a property existence constraint


 
  drop constraint on (e:employee) assert exists(e.empid)





 







Create a Node Key Constraint


 
  create constraint on (e:employee) assert (e.empid) is node key





 







Dropping a node key Constraint


 
  drop constraint on (e:employee) assert (e.empid) is node key