Neo4j

igorbmartins · 06-06-2022

Hi everyone, how are you doing?Guys, I would like a little help. Actually I am doing a study to my company to verify the possibility to use Neo4j as our first NoSql data base.Firstly I created a small use case with 10 nodes and 12 relationships with ...

igorbmartins · 05-18-2022

Hello everybody, how are you? Gus, I would like to create a cypher query similar to a left join in a SQL Query. I made the bellow query but the result is not what I want. After the query I will explain what is wrong for me. // Return data from a spec...

igorbmartins · 05-17-2022

Hello guys, it’s me again. Now, I would like to make a select “match” with two situations. I am mean, with two different nodes. The bellow query give me my answer, but I need to execute two separate query. Instead of that I need to execute only one q...

igorbmartins · 05-17-2022

Hello, how are you? Guys, I am new on neo4j, so I need a lot of help. At this momment I am trying to create a relationship between two nodes and I am receiving a messa error. To the first match I am basing on a existin relationship. I think that thi...

igorbmartins · 05-16-2022

Hello everybody. I am new o neo4j so i have some doubts. I am studing it since last month. In this topic my doubt could be simple, but I try to find in others comunities but I didn't find it. When I was creating a relationship i make a mistack so in ...

igorbmartins · 06-08-2022

Hi, after look for some perfoemance recomendation I found some noutes about 3 parameters:dbms.memory.heap.initial_sizedbms.memory.heap.max_sizedbms.memory.pagecache.sizeAfter change its values, the process works fine in INSERT and in UPDATE mode.Than...

igorbmartins · 06-07-2022

HI everyone, it is me again.After create the index the merge in a empty database works fine. When I run the command to insert 1.000.000 rows the process last 34 seconds. After that I executed the command again to check the performande in update mode,...

igorbmartins · 06-06-2022

Thanks glilienfield. In my first test I have didn't created any index because I was thinking that it will not make any difference because it is an insert. But I forgot that it is a merg so, it first check if it exist so the index make difference. Aft...

igorbmartins · 05-18-2022

Thank you man. Using OPTIONAL MATCH the query works prorpely. Thanks

igorbmartins · 05-18-2022

Hi Rogerio, I solve this problem putting an alias like: match ( pu:PessoaUnica {CPF:'00000000001'}) return pu as po union all match ( po:PessoaOrigem {CPF:'00000000001'}) return po Thanks

Neo4j

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Performance issue while doing a LOAD CSV

Cypher query like a left join in SQL query

Create a query that brings data from two different nodes that doesn't have any relationship

Creating new relationship based on another relationship

How to delete an empty node?

Re: Performance issue while doing a LOAD CSV

Re: Performance issue while doing a LOAD CSV

Re: Performance issue while doing a LOAD CSV

Re: Cypher query like a left join in SQL query

Re: Create a query that brings data from two different nodes that doesn't have any relationship