The optional match is like an outer join MATCH (s:Student) OPTIONAL MATCH (s)-[:REGISTRATIOn]->(c:Course) WITH s, count(c) as courses RETURN s.name, s.intelligence, courses
On Tue, Apr 12, 2016 at 12:19 PM, Marwa Elabri <marwaela...@gmail.com> wrote: > please can one help me to find a solution to this request > > i have in my database this schema (student)-[registration]-(course) > > for the node student i have the property : intillegence > for the node course i have the property : difficulty > > i want to recupere the inteliggence of student those who are registrated > and evenc those who are not registrated to courses > > given that i have 15 students and 4 students from them are not registrated > and i have 27 registrations so i want to get values of intelligence of > student > > the result normaly will be: 15 rows= nember of students and even for > student that are not registrated i want to get null values > > i execute this match (a:student)-[b:registration]-(c:course) return > a.intelligence > but my problem when i execute this query i get 27 registration which is > equal to the number of registration so i get some rows that are repeted > which is wrong i want to get just 15 rows > please can you help me to rectify this request > > thanks > > > -- > You received this message because you are subscribed to the Google Groups > "Neo4j" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to neo4j+unsubscr...@googlegroups.com. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "Neo4j" group. To unsubscribe from this group and stop receiving emails from it, send an email to neo4j+unsubscr...@googlegroups.com. For more options, visit https://groups.google.com/d/optout.
