Neo4j

naughtyGitCat · 01-17-2020

I have these relations: NodeType1 A {ts:11} =r1=> NodeType2 m NodeType1 B {ts: 22} =r1=> NodeType2 m NodeType1 Y {ts: 22} =r1=> NodeType2 n NodeType1 Z {ts: 32} =r1=> NodeType2 n NodeType1 X {ts: 23} =r1=> NodeType2 o ....... For each NodeType2, I wi...

naughtyGitCat · 01-18-2020

Yes。We can send many times parameterized query to neo4j server, But this need many times net io, and cause inconsistency, unless do a explict trx.begin(), Is there any way to send a non parameterized query to finish it

naughtyGitCat · 01-17-2020

yes, but the NodeType2 name is not specified at first, in database, there is a lot of NodeType2 node but not all named by m

naughtyGitCat · 01-17-2020

your code means select max(type1) where type2.name='xxx' No offense, but I want to do this way, select max(type1) group by type2.name

naughtyGitCat · 01-17-2020

Yeah, for NodeType2 { // run cypher to find max(ts) NodeType1; } is a method, but need many times net io, and cause inconsistency I mean do run cypher one time, to find group by type2 max(type1)

naughtyGitCat · 01-17-2020

I'm sorry it's a mistake NodeType1 A {ts:11} =r1=> NodeType2 m NodeType1 B {ts: 22} =r1=> NodeType2 m NodeType1 Y {ts: 22} =r1=> NodeType2 n NodeType1 Z {ts: 32} =r1=> NodeType2 n NodeType1 X {ts: 23} =r1=> NodeType2 o

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How to make a group by in cypher query language?

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