正確使用ORDER BY的困惑

Question

我正在neo4j中試驗日期。現在我想用ISODateString對我的結果進行排序。我創建了一個密碼查詢，如下所示：

MATCH(e:Expedition {id : "BJGYmzwZb"})-[pje]-(u:User) 
WHERE (e)-[:POSSIBLY_JOINS_EXPEDITION]-(u) OR (e)-[:JOINS_EXPEDITION]-(u) 
WITH e, u, apoc.date.parse(pje.createdAt, 's',"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'") as date 
ORDER by date 
OPTIONAL MATCH(u)<-[invitee:POSSIBLY_JOINS_EXPEDITION]-(e) 
OPTIONAL MATCH(u)-[attendee:JOINS_EXPEDITION]->(e) 
OPTIONAL MATCH(u)-[applicant:POSSIBLY_JOINS_EXPEDITION]->(e) 
RETURN date, {user: properties(u), isInvitee: COUNT(invitee) > 0, isApplicant: COUNT(applicant) > 0, isAttendee: COUNT(attendee) > 0} as u 

返回的結果未正確排序。而以下查詢確實以正確的順序返回結果。我只是刪除了零件OPTIONAL MATCH。

MATCH(e:Expedition {id : "BJGYmzwZb"})-[pje]-(u:User) 
WHERE (e)-[:POSSIBLY_JOINS_EXPEDITION]-(u) OR (e)-[:JOINS_EXPEDITION]-(u) 
WITH e, u, apoc.date.parse(pje.createdAt, 's',"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'") as date 
ORDER by date 
RETURN date, {user: properties(u)} as u 

有什麼建議我做錯了什麼？我是否需要與OPTIONAL MATCH加入區別？

Answer 1

將ORDER by date的RETURN語句之後，這樣的：

MATCH(e:Expedition {id : "BJGYmzwZb"})-[pje]-(u:User) 
WHERE (e)-[:POSSIBLY_JOINS_EXPEDITION]-(u) OR (e)-[:JOINS_EXPEDITION]-(u) 
WITH e, u, apoc.date.parse(pje.createdAt, 's',"yyyy-MM-dd'T'HH:mm:ss.SSS'Z'") as date 
OPTIONAL MATCH(u)<-[invitee:POSSIBLY_JOINS_EXPEDITION]-(e) 
OPTIONAL MATCH(u)-[attendee:JOINS_EXPEDITION]->(e) 
OPTIONAL MATCH(u)-[applicant:POSSIBLY_JOINS_EXPEDITION]->(e) 
RETURN date, {user: properties(u), isInvitee: COUNT(invitee) > 0, isApplicant: COUNT(applicant) > 0, isAttendee: COUNT(attendee) > 0} as u 
ORDER by date